A.起升鋼絲繩的倍率為2倍率時,其極限位置應(yīng)為1000mm B.起升鋼絲繩的倍率為2倍率時,其極限位置應(yīng)為800mm C.起升鋼絲繩的倍率為4倍率時,其極限位置應(yīng)為700mm D.起升鋼絲繩的倍率為4倍率時,其極限位置應(yīng)為400mm
A.10mA B.20mA C.30mA D.40mA
A.10mA B.15mA C.20mA D.30mA