锁骨骨折肩胛区有严重损害时的处理？双吊杆作业时,舷内吊杆的仰角不要过大,否则会( )。Which of the following devices is a common basic element with nearly all mechanical governors?不属于应急供电设备的是( )
In a diesel engine, when refitting piston rings you should ①check the ring gap at the smallest diameter of the cylinder ②remove carbon from the ring groove当你发现在右前方直至正前方有一船队向本船驶来,
船舶静稳性曲线是船舶在( )的稳性力矩随倾角变化的关系曲线。Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?我国《海船船员发证
样品存放以下正确的是?()机动船在航时,除显示桅灯外＿＿＿＿。The term “moderate speed” was previously interpreted as meaning a speed which would enable a vessel ______ within half the range of visibility
