当减温水量已增至最大,过热蒸汽温度仍然高时,可采用哪些措施降低汽温?
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In order to find out which lifeboat you are assigned, you should look at the ().
A. Certificate of Inspection
B. Station Bill
C. Ships Articles
D. Fire Control Pla
ZYJ7型分动外锁闭电液转辙机,外锁装置的锁钩铜套磨损不得超过1/3。
A. 正确
B. 错误
()是利用阀芯和阀体的相对运动来变换油液流动的方向,接通或关闭油路。