... faucet (连接管子的)承口 feather check 羽毛状裂缝 feather edge 薄缘 ...
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发丝裂缝 feather check; feather cracking; feather-cracking; microcracking 发丝裂纹 craze crack; hair crack .
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Another possibility to check approximately the feather and down proofness is to measure the air permeability of the fabric.
另外可能近似测试出羽毛羽绒不穿透性的方法是:测量面料的空气渗透性。
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