相关考题
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单项选择题
ASMEBPE规定的7#接口的开孔尺寸是:()
A.56.7mm
B.44.3mm
C.57.15mm
D.57.27mm -
单项选择题
下列哪个规格的O型圈为符合ISO3601-2012标准的226O型圈?()
A.φd1=50.39mm,φd2=3.75mm
B.φd1=37.69mm,φd2=3.53mm
C.φd1=50.00mm,φd2=3.55mm
D.φd1=50.39mm,φd2=3.53mm -
单项选择题
聚丙烯滤材的活性炭截留测试结果见下表,下列哪种孔径标示不正确?()
A.3μm,≥96%
B.5μm,≥98%
C.10μm,≥99%
D.30μm,≥98%
