A.renewed
B.welded
C.machined
D.chromium-plated
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A.film
B.cap
C.lacquer
D.shell
A.a gear
B.a cam
C.a rod
D.a miler
A.recirculating
B.total loss
C.cooling
D.refrigeration
A.a setting tank
B.a service tank
C.a head tank
D.an expansion joint
The working cycle of a four-stroke diesel engine consists of four events:（）
(1) compression
(2) expansion
(3) exhaust
(4) suctionThe correct sequence is
A.(4)-(2)-(3)-(1)
B.(4)-(3)-(1)-(2)
C.(4)-(3)-(2)-(1)
D.(4)-(1)-(2)-(3)
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