在Chemtrol Tru-Bloc关闭阀安装和测试后，连接到满储的储罐的管道开口将不会开始滴漏。

Open piping attached to a filled tank will not start to drip-leak following installation and test of a Chemtrol Tru-Bloc shut-off valve.

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只有四个姿势被发现在不借助“辅助器械”下可能实现。另外六个需要借助特殊的弹性带和同一端开口的睡袋一样的可膨胀的管道。

Only four positions were found possible without "mechanical assistance". The other six needed a special elastic belt and inflatable tunnel, like an open-ended sleeping bag.

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钻塔：主起吊绞车和升降机系统可通过船底72英尺宽的开口，提升1,250吨重的管道和机械。

Derrick: the main hoist winch and a system of elevators lifts 1,250 tons of pipes and machinery through the 72.

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