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紗(sha)支測(ce)(ce)長(chang)(chang)(chang)儀是(shi)測(ce)(ce)長(chang)(chang)(chang)儀器(qi)(qi)的(de)一種,紗(sha)支測(ce)(ce)長(chang)(chang)(chang)儀主要適用于測(ce)(ce)定毛(mao)梭織(zhi)物、毛(mao)針織(zhi)物和(he)紗(sha)線(xian)(xian)(xian)織(zhi)前長(chang)(chang)(chang)度,計(ji)算其線(xian)(xian)(xian)密度和(he)編(bian)結密度系數。測(ce)(ce)量的(de)時候,將(jiang)被(bei)測(ce)(ce)紗(sha)線(xian)(xian)(xian)試樣兩端分別夾(jia)在有(you)張力可改變并(bing)施加的(de)左夾(jia)持(chi)器(qi)(qi)內(nei)和(he)右(you)夾(jia)持(chi)器(qi)(qi)內(nei),移(yi)動(dong)右(you)夾(jia)持(chi)器(qi)(qi)使平衡體(ti)三刻線(xian)(xian)(xian)對齊,此(ci)時記下夾(jia)持(chi)器(qi)(qi)引(yin)伸夾(jia)上(shang)的(de)紅色刻度線(xian)(xian)(xian)所對準長(chang)(chang)(chang)度標(biao)尺上(shang)的(de)數值(zhi),此(ci)值(zhi)為此(ci)根紗(sha)線(xian)(xian)(xian)的(de)長(chang)(chang)(chang)度。紗(sha)支測(ce)(ce)長(chang)(chang)(chang)儀可以測(ce)(ce)定彈性紗(sha)、膨體(ti)紗(sha)的(de)彈性。