In diesel engineering practice, the term used to express the ignition quality of a particular fuel is()
In a trunk type diesel engine piston, the thickness of the head or crown is determined by the()
Ⅰ.statically balanced
Ⅱ.heat dissipation requirement
为了保证船舶航行安全,首先要确定船舶的航向与位置。船舶定位方法按照参照目标可分为( )。
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