The fourth engineer takes charge of that work and co - operate by electric engineer 三管轮负责这项工作,电机员也协助配合。
2.
One week interval . sms requires that every crew on board is capable of operating it . the fourth engineer must take charge of maintenance and repair work 您多长时间试验一次救生艇机?谁负责操纵艇机?谁负责维护和修理艇机?