UID:112422
UID:72204
UID:121602
UID:110010
UID:97940
ywb750912:1正确,2错误。1的水流是由上而下,所有沉淀物都在上面,2的水流由下而上,所有沉淀物都在滤棉下面,一是不便清洗二是容易堵 (2018-03-05 11:53) cmt3ceCb
UID:128591
UID:107019
UID:121837
UID:46516
UID:125292