这需要精确的定位，以便将支腿定位到提升架的扶正导轨中。

This required precise positioning to locate the legs into the stabbing guides of the lifting cradle.

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止回阀的提升架总成应该通过耐腐蚀塑料导轨引导。

The check valve poppet assembly shall be guided via the use of a corrosion resistant plastic guide.

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凯恒中心正立面由两道平面位置重合的钢结构连廊相连，其支撑架和提升架的选择困难。

There are two steel galleries in front elevation of Kaiheng Center, whose support frame and lifting frame selection were difficult during construction.

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