Setting a sealing equipment astern on the tailshaft can’t （） prevent the seawater from intergrating。 prevent the lube oil from running out of the outside aboard。 strengthen the intencity of the sterntube。 prevent the mud and sand from entering the lube oil system。
以下哪个选项是新增建设用地的缴款义务人（） 市、县人民政府。 市、县国土资源管理部门。 用地单位。 省级国土资源管理部门。
A block and tackle is rove to advantage. This means that the（）. blocks have been overhauled。 hauling parts of two tackles are attached。 hauling part leads through the movable block。 hauling part leads through the standing block。
In the process of the shafting management, special attention should be paid to（） on the sailing, the water in the aft peak tank should be excluded as much as possible。 the stuffing style ahead sealing shouldn’t have any water leaking out。 Simplex astern sealing shouldn’t have any oil leaking out。 Simplex ahead sealing can have some oil leaking out。
运营系统设计的内容包括（）。 产品和服务的设计。 流程的设计。 设施的选址。 设施的布置。
手动卷帘门的防滑锁的作用是（）。
