国产成人久久AV免费看_72种姿势欧美久久久久大黄蕉_成人无遮挡裸免费视频在线观看_成人嫩草研究院久久久精品_加勒比中文无码久久综合色_亚洲国产日韩欧美综合另类bd_禁止18点击进入在线看片尤物_www亚洲精品久久久乳_日韩一欧美内射在线观看_国产成人午夜福利在线播放

Coal powder charcoal to choose optimal fine quality too west coal as raw material, through carbonization, activation and grinding powder refined processed, in black powder, can be made according to user requirements different adsorption and decolorization ability, different fineness grade activated carbon, powdered activated carbon adsorption speed, with flocculating effect and leaching effect, and the construction of the unit using less investment, low running cost, and pretreatment in water plant, sewage treatment plant.