立式车床每次下降或上升横梁时,应先将横梁上升或下降()mm,这是为了消除间隙,以保持其位置精度。
A.10~20
B.20~30
C.25~35
D.5~15
参考答案:B
对重与轿厢对应,悬挂在曳引绳的另一端,起平衡轿厢重量和部分载荷的作用。()
The company began by offering computer software solutions to local businesses in the greater Seattle metropolitan area.
A.True
B.False