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Care and cleanliness are required when installing diesel fuel filters （）.

A.to prevent the fuel system from becoming air-hound
B.to prevent the fuel system becoming clogged with dirty particles
C.both of the above
D.to prevent the lubricating oil from leaking out of the filter element

單項(xiàng)選擇題

Bridge gauge can be used to measure （） of a diesel engine.

A.diameters of journals
B.deflections of crankwebs
C.diameters of crankpins
D.none of the above