工作人员怎样正确出人烟道?
参考答案:
工作人员进出烟道时,一般应用梯子上下。不能使用梯子的地方,可使用牢固的绳梯,放置绳梯必须避开热灰,防止绳梯被热灰烧坏。
The new machine is supposed to be the solution to all our production problems, but"____".
A.Practice makes perfect
B.The proof of the pudding is in the eating
C.Many hands make light work
D.I think, therefore I am
切削用量主要有()()()称为切削用量三要素。