A、lead
B、forged steel
C、alloy steel
D、aluminum alloy
更多“Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.”相关的问题
A、to remove heat from oil cooled pistons B、to wash away wear detritus C、to neutralize acidic products D、all of the above
A、marine broadcast Notice to Mariners B、Weekly Notices to Mariners C、corrected editions of charts D、Light Lists
A、Admiralty Sailing Directions B、Admiralty List of Signals C、Mariner's Handbook D、Admiralty Notices to Mariners
A、cooled to appropriate temperature B、warmed up gradually to appropriate temperature C、opened up and renewed D、ground and polished
A、A.about marine pollution prevention B、B.covering marine protection of life C、C.about marine D、D.about ship and port security
A、A.greater high temperature strength B、B.better heat conductivity C、C.greater weight per cubic inch D、D.increased resistance to wear
A、double-acting engine B、opposed pistons engine C、single-acting engine D、horizontal acting engine
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