Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

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（）

One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

The ISPS Code consists of a mandatory section-Part A, which shows（）

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

The condensers located in various stages of a flash evaporator are cooled by（）

Using a file without a handle may result in （）

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