Knotless operation can reduce yarn defects and improve resultant yarn quality on a certain degree.
无接头操作法在一定程度上减低了纱疵,对成纱质量有很好的改善。
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Though America sees a million emergency-room visits a year from drug abuse, manufacturers see no need to invest in quality control when the penalty for selling contaminated cocaine is the same as for smuggling the pure stuff.
尽管美国每年因为滥用毒品而进入急救室
人次有一百万之多,但对这个产业
官方管制却微乎其微:由于对销售受污染可卡因
惩罚与偷运纯正可卡因
惩罚
一样
,制造商 甚至不认为有必要

控制上浪费投资。