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问题:

[单选] Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?()

A . clean the flame scanner photocell window
B . Inspect and clean all solenoid valves
C . lift the safety valves by hand
D . Inspect for oil or water leak

库内码放时,为了确保货物安全和作业方便,要留有五距,请简述五距都有哪些?分别指哪里到哪里的距离?每个距离是多少? 湖北农信社网上银行的网址是https://ebank.hb96568.com。 客户办理换卡(换卡号)交易后,需要到网点进行短信银行扣费账号变更。 为了确保货物安全和作业方便,货场和库房内要留有必要的作业通道和安全距离。其中,货位与专用线轨道、龙门吊道轨的距离不得小于() 1.5米。 1.2米。 0.8米。 2米。 The boom indicator on a crane will indicate the(). length of the boom。 angle of the boom。 lifting capacity of the boom。 direction of the boom。 Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?()
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