the replacement reaction of ferric（iii） chloride with aluminum produced many bubbles, but no iron elemental - 鐵 個影片檔及 b 捲影像00:07
ds medieval italian-looking buildings with wrought iron fence and archway beyond - 鐵 個影片檔及 b 捲影像00:23
ds medieval italian-looking buildings with wrought iron fence and archway beyond - 鐵 個影片檔及 b 捲影像00:23
ds medieval italian-looking buildings with wrought iron fence and archway beyond - 鐵 個影片檔及 b 捲影像00:28
ds medieval italian-looking buildings with wrought iron fence and archway beyond - 鐵 個影片檔及 b 捲影像00:18
ms medieval italian-looking buildings with wrought iron fence and lone pedestrian - 鐵 個影片檔及 b 捲影像00:16
ha pedestrians milling about a large lobby of archways and flower-like hanging fixtures - 鐵 個影片檔及 b 捲影像00:57
ds pedestrians walking through a large lobby with ornate ceiling fixtures, archways, and windows - 鐵 個影片檔及 b 捲影像00:23
ms tourists walking by the iron gates in front of the white house / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:14
ha an iron gate flanked by stone columns being opened electronically / united states - 鐵 個影片檔及 b 捲影像00:22
october 17, 2010 through iron fence, students in uniforms walking around courtyard in front of school / mozambique - 鐵 個影片檔及 b 捲影像00:19
td church spire beyond wrought iron fence spikes / philadelphia, pennsylvania, united states - 鐵 個影片檔及 b 捲影像00:12
la independence hall bell tower seen through iron fence spikes / philadelphia, pennsylvania, united states - 鐵 個影片檔及 b 捲影像00:09美國獨立紀念館
ms colonial painting hanging from fence with city buildings beyond / philadelphia, pennsylvania, united states - 鐵 個影片檔及 b 捲影像00:18
la tops of philadelphia skyline beyond fence with painting attached / pennsylvania, united states - 鐵 個影片檔及 b 捲影像00:15
la city building with many windows stands behind several trees with fall foliage and a wrought iron fence / philadelphia, pennsylvania, united states - 鐵 個影片檔及 b 捲影像00:20
la city building with many windows stands behind several trees with fall foliage and a wrought iron fence / philadelphia, pennsylvania, united states - 鐵 個影片檔及 b 捲影像00:26
pan hudson university sign on other side of iron fence / new york city, new york, united states - 鐵 個影片檔及 b 捲影像00:14
ts dark sedan entering warehouse beyond iron fence / los angeles, california, united states - 鐵 個影片檔及 b 捲影像00:09貨倉
steel workers shovel iron ore into furnace and set furnace levels and output/great britain - 鐵 個影片檔及 b 捲影像00:35
iron ore and coke are dumped into container, man monitors blast furnace equipment, molten steel pours from container/great britain - 鐵 個影片檔及 b 捲影像00:18
ships travel across the water, over head transporters move and dump iron ore onto ships/great britain - 鐵 個影片檔及 b 捲影像00:24
train travels along tracks with iron ore in wagons, iron ore is dumped into large containers, ships are traveling on the water /great britain - 鐵 個影片檔及 b 捲影像00:26
train travels along tracks at steel plant, coke plant is being built, excavators cut away at the side of mountains, crane dumps iron ore onto train... - 鐵 個影片檔及 b 捲影像00:40
worker overseeing fiery molten iron, train entering factory, molten iron being poured, and scrap iron are placed into an open-hearth furnace / united... - 鐵 個影片檔及 b 捲影像00:29
pan lafayette park, fountain, and revolutionary war cannon, with pedestrians behind wrought iron fence / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:15
pov revolutionary war cannon and formal flowerbeds in lafayette park behind wrought iron fence, with pedestrians and traffic / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:09
r/f leafy tree in lafayette park, with pedestrians walking / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:14
selective focus tulips in lafayette park, with pedestrians walking / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:17
pov red tulips in flowerbed in lafayette park, with wrought iron fence, pedestrians, and revolutionary war cannon / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:15
cu white house north portico, beyond decorative iron fence / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:13
cu columns and detailing of white house north portico, beyond decorative iron fence / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:09
ws north entrance to the white house behind decorative iron fence, tourists walking in front / washington, d.c., united states - 鐵 個影片檔及 b 捲影像00:14
la road construction blocking traffic and impeding pedestrians near intersection of soho streets, passing buildings with cast-iron architecture / new york city, new york, united states - 鐵 個影片檔及 b 捲影像00:17
la traffic on soho street passing buildings with cast-iron architecture / new york city, new york, united states - 鐵 個影片檔及 b 捲影像00:13
td cast-iron architecture building on a soho street with parked cars / new york city, new york, united states - 鐵 個影片檔及 b 捲影像00:09
pan the top story of a tall, gray office building with windows, pediments, and columns / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:10
tu eisenhower executive office building with many windows surrounded by ornate pediments and columns / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:19
zo eisenhower executive office building with many windows surrounded by ornate pediments / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:08辦公室
la a tall, gray office building with several windows lining each story embedded in intricate stone designs / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:10
ws traffic passing in front of eisenhower executive office buildings where safety cones are lining the front sidewalk / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:10
td traffic passing in front of one branch of a large office building with many windows where safety cones are lining the front sidewalk / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:23
la traffic passing in front of one branch of a large office building with many windows / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:16
la eisenhower executive office building with windows lining every floor / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:13辦公室
la a large office building with many windows lining every floor / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:13辦公室
la a large office building with many windows and columns lining every floor / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:14
la eisenhower executive office building with the blue sky above and behind / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:15
la cars driving through traffic passing the front of eisenhower executive office buildings / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:13
la a large office building with many windows and columns / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:17
la cars driving past a large office building with street lights, cone, and small excavator residing on the sidewalk / washington, district of columbia, united states - 鐵 個影片檔及 b 捲影像00:17辦公室
