检查一般短毛地毯的密度和弹性，主要有两种方法。
Check the density of general undercoat carpet and flexibility, basically have two kinds of methods.
工业实验结果比小试结果更佳，制得了泡孔密度均匀、柔软、弹性好的海绵背衬地毯。
Commercial experiment had better results than that of bench test. Soft sponge back-lining carpet with symmetrical bubble hole density and high elasticity carpet was produced.
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 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.
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