A.應(yīng)水平放置 B.靠近機(jī)器側(cè)應(yīng)低于外伸側(cè) C.靠近機(jī)器側(cè)應(yīng)高于外伸側(cè) D.以上都不對
A.56.6,56.6 B.53.6,53.6 C.56.6,53.6 D.53.6,56.6
A.1 B.2 C.3 D.4