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【单选题】
经常取样，颗粒数量和滤子堵塞指示用来监控液压油。
A.
Check frequently,dust count and filter clog indicator are used to monitor hydraulic oil.
B.
Check frequently,dirt and filter clogging indicators are used to monitor hydraulic fluid.
C.
Frequent sampling,particle count and check of filter clogging indicators to monitor the hydraulic fluid.
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】万级手术间空气中≥5um的尘粒数含量是：（）。
A.
3粒/L～30粒/L
B.
0.3粒/m3～3粒/m3
C.
0.3粒/L～3粒/L
D.
3粒/m3～30粒/m3