[单选题]当铁梨木艉轴承的轴承间隙超过极限间隙,但铁梨木板条的厚度仍在要求范围以内时,可采用()方法修理。Ⅰ.更换艉轴;Ⅱ.更换艉轴铜套;Ⅲ.在艉轴承下瓦下面垫入整张铜皮;Ⅳ.更换艉轴承衬套;Ⅴ.在艉轴承下瓦上面垫入整张铜皮。
正确答案 :A
Ⅱ+Ⅲ
[单选题]The lower end of each piston rod is reduced in diameter to fit a bore in (), this being secured to the piston rod by a nut.
正确答案 :D
the cross-head
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