... 中支架 wedium-height trestle 低支架 low trestle 固定支架 fixing trestle ...
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To this end, sheet-type invert trestle of low cost, simple structure, convenient mobility and light weight is becoming increasingly popular at tunnelling.
为此，自行设计制造成本低、结构简单、移动快捷、轻便的片式仰拱栈桥在隧道施工现场愈来愈普遍。
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