单项选择题
A.resisting oxidization B.reducing friction C.promoting moving speed D.developing inertia
A level gauge for a tank is to （）.A.give the pressureB....
单项选择题A level gauge for a tank is to （）.
A.give the pressure B.give the contents C.give the shape of the tank D.give the accuracy level
A hot air start pipe indicates that there is （）.A.ineff...
单项选择题A hot air start pipe indicates that there is （）.
A.inefficient cooling B.a leaking air start valve C.a clogged drain valve D.a leaking air bottle
A high temperature alarm or （） which will melt is used ...
单项选择题A high temperature alarm or （） which will melt is used to guard against the explosion of compressor air pipelines.
A.a flame trap B.a relief valve C.a fusible plug D.a bursting cap
