提升门
Why does leaning against the lift door constitute potential danger?
为何靠近升降机门会构成潜在危险?
Full size details of the fire rated lift door framing sections as required by the engineer and fire rated test certificate of same provided by an independent testing laboratory to be approved by the engineer.
防火电梯门框架截面的全尺寸详情如监理工程师的要求,由独立的测试实验室出具的防火试验证明待监理工程师批准。
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