water tracing meaning in English

流水跟踪

Chemical analysis of propylene . determination of water traces
丙烯的化学分析.水痕量的测定
One - off cleaning dusts on the floor with no besmirch and water trace left . the dusts and hairs will be absorbed on the static fibre roller of mop and not dirty other areas . while cleaning , turn the metal handle then dust - resistant roller will circumgyrate , the cleaning surfaces transform from one to five - means the mop can cleanse areas as much as five mops do
-将拖把手柄杆一转动,除尘滚筒即可旋转,由一个清洁面可转变为至少五个清洁面,即一支清洁拖把可达到至少五支拖把的清洁面积,亦则清扫一个房间只需旋转滚五分之一面积左右即可完成,完全免去传统拖把因脏污而必须来回清洗的时间