... light drilling boom轻型钻臂 Tunnel placing Boom隧道布料机 The guns went "boom".炮声隆隆。 ...
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tunnel placing boom
隧道敷设吊杆
以上为机器翻译结果，长、整句建议使用 人工翻译 。
After being awarded the contract, a decided to purchase 3 site concrete pumps and the tunnel placing Boom from the b.
在得到合同后，决定从B那里购买3台现浇混凝土泵和隧道布料机。
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