复数： treadles

Drag onto the page . Right-click to make a treadle , or to resize .

拖到绘图页上。右击可成为踏板或调整大小。

The treadle pump - an irrigation technology adapted to the needs of small farmers .

踩踏式抽水机一种适合于小型农户用的灌溉技术。

Morse operated the treadle the graphophone was not electrically powered-and on his return to london delightedly showed henry edmunds the product of his labors : " a small black cylinder with a few black spiral lines traced upon it containing the record of the voice and speech of the celebrated queen . "

莫尔斯脚踩踏板亲自操作（格拉福风留声机不是电动留声机），并且一回到伦敦就兴高采烈地把他的劳动成果拿给亨利埃德蒙兹看：“一个黑色小圆筒上有几道黑色螺旋线，记录着大名鼎鼎的女王的声音。”