国产AV一区二区三区无码野战

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                  怎樣區分膠粘床墊和縫制床墊
                  時間:2018-06-20 作者:admin 點擊:765次

                   告訴你鑒別縫制棕墊的方法:上圖看似都是機器縫制棕墊,其實左兩圖是膠粘后再縫制的,另一張兩個棕墊并列的才是不含膠的純縫制棕墊。目測含膠棕墊針孔大,手摸有粘度感覺,不掉渣;純棕縫制目測針孔小,手摸刀切側面掉細微渣。稱重:同規格不含膠的棕墊要重!重量的區別“你懂的”

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