RM80型清筛机柴油机油浴空气滤清器每工作()小时应换油。
A. 50
B. 100
C. 200
D. 400
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Refer to the exhibit,a network administrator cannot establish a telnet session with the indicated router.What is the cause of this failure?()
A level 5 password is not set
B. The vty password is missing
C. The console password is missing
D. An ACL is blocking Telnet acce
长3m~6m木手板,厚度不应小于50mm。
A. 正确
B. 错误
机泵在运行中,由于介质、水以及其他物质可能窜入油箱内,影响泵的正常运行,因此要经常检查润滑剂的()
A. 规格
B. 牌号
C. 质量
D. 厂家