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 . "
