By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）

The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.

If separating effect is not good, which measure should be taken （）

（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.