The mechanics character of wall rock distinctly affects suffered force and distortion of pipe liner structure.

围岩的力学性质对管片衬砌结构的受力和变形有较大的影响。

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Conventional unbonded flexible pipe designs are a multi-layer construction based upon a thermoplastic pipe liner reinforced with metallic materials.

常规的无粘结柔性管采用的是多层构造，主要为金属材料增强的热塑性管道衬里。

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The NP-160 product as an example, add a vacuum tube into 25 branches, while remaining 4mm pipe liner connecting hole is too narrow, obviously can not guarantee the quality of the water tank.

以NP - 160产品为例，再增加一支真空管，变为25支，则内胆管孔连接处仅剩4 mm，显然太窄而无法保证水箱质量。

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We know with some certainty that workers were in the final stages of setting the final sections of pipe (production liner) in the hole and cementing it in place.

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As the liner is inserted into the pipe, it is turned inside out and forced through using water or air pressure.

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