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[单选题]
三级过滤中滤网的目数是指()的面积上有多少网孔数,即筛网的网孔数。
A.1mm*1mm
B.1英寸*1英寸
C.1cm*1cm
D.1dm*1dm
查看答案
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A.1mm*1mm
B.1英寸*1英寸
C.1cm*1cm
D.1dm*1dm
A.从厂内领来的润滑油经过滤网加到油站的大桶内
B.由大桶经滤网放到油壶内
C.用油壶向注油点加油时用带有滤网的漏斗
D.由厂内领来的润滑油必须经过滤油机过滤三次才能加到大桶内
(A)40~60目铜丝网
(B)60~80目铜丝网
(C)80~100目铜丝网
(D)无特别要求