The cover material of floor carpet, the substrate mass, the front heavy layer as well as the assembly process affect greatly on the carpet absorption performance.
主地毯中上层面料材料、下层材料的面密度、前端涂层及装配工艺对地毯的吸音性能具有较大的影响；
The front end cover and the rear end cover are fixed by screws and rabbets. Meanwhile, the rotor assembly is fixed.
前、后端盖利用螺钉及止口固定，同时将转子总成固定。
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