... single-gun tube 单枪彩色显像管 single-layer tube 单层盘管 single-tube injector 单管注射器 ...
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single layer coil tube 单层盘管
single layer stainless-steel tube 单层钢管
single-layer tube
单层管
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The tunnel consists of a single tube with four lanes, and was excavated with the layer-step method, which is a new attempt in constructing the tunnel with large across span.
隧道为单洞四车道，采用分层台阶法进行开挖，在大跨度隧道施工中是一种新尝试。
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