victorian industrial history, dynamometer, or dyno, is a device used to measure force, torque, or power, vintage illustration 19th century 1870s, german text - 握力計 幅插畫檔、美工圖案、卡通及圖標
prony brake dynamometer ,used by the magdeburg steam boiler monitoring association - 握力計 幅插畫檔、美工圖案、卡通及圖標
graphical representation of electrical characteristics in series dynamo circuits - 握力計 幅插畫檔、美工圖案、卡通及圖標