手動滑車

   手(shou)動(dong)滑(hua)車(che)。由(you)人(ren)力(li)拉(la)動(dong)曳(ye)引(yin)鏈(lian)，通(tong)過(guo)蝸(wo)杆(gan)蝸(wo)輪(lun)驅(qu)動(dong)鏈(lian)卷(juan)筒(tong)
，使(shi)重(zhong)物(wu)升(sheng)降(jiang)。采(cai)用(yong)載(zai)重(zhong)自(zi)製(zhi)式(shi)製(zhi)動(dong)器(qi)，載(zai)荷(he)越(yue)重(zhong)製(zhi)動(dong)力(li)矩(ju)越(yue)大(da)

，安(an)全(quan)可(ke)靠(kao)。工(gong)作(zuo)範(fan)圍(wei)為(wei)掛(gua)鉤(gou)下(xia)的(de)一(yi)條(tiao)垂(chui)直(zhi)線(xian)。