wool also has a high settleable solid content . 羊毛還含有沉淀性能極好的固體物質(zhì)。
german standard methods for the examination of water, waste water and sludge; general measures of effects and substances group h, determination of the settleable matter by volume in water and waste water 德國檢驗水廢水和污泥的標(biāo)準(zhǔn)方法.第9部分:效果和物