The construction, the material property and construction technique of double-layer Danpalon roof screen system are introduced in this paper.
介绍双层登普板采光屋面天幕系统的结构、材料性能和施工技术。
The die cast zinc base and double layer perforated steel screen construction makes this microphone extremely rugged.
在压铸锌基和双层穿孔钢丝网的建设，使这个麦克风极为坚固。
The die cast zinc base and double layer perforated steel screen construction makes this microphone extremely rugged.
在压铸锌基和双层穿孔钢丝网的建设，使这个麦克风极为坚固。
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