armoured concrete windowing filter tube
...钢筋混凝土开窗过滤器；无砂混凝土过滤器 [gap=1020] other subjects of water conservancy project; tube well; submersible pump Duan; armoured concrete windowing filter tube; nothing grit concrete filter ..
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armoured concrete windowing filter tube
铠装混凝土开窗过滤管
以上为机器翻译结果，长、整句建议使用 人工翻译 。