| 摘要 |
The invention relates to a design method for the sampling unit. The method comprises providing the movable rod with a refreshing passage; arranging for the head end of the passage to extend to the bottom portion of the sampling bore, arranging for the tail end of the refreshing passage to extend away from the handle and to extend to the exterior cylindrical surface of the movable rod; arranging the tail end of the refreshing passage inside the sampling chamber when the sampling bore is inside the sampling chamber; arranging the tail end of the passage inside the axle sleeve and near to the back surface of the axle sleeve when the sampling bore is inside the axle sleeve and near to the front surface of the axle sleeve. Because concentrates in the sampling bore is refreshing in real time, it is no need to fast rotate the hand firstly when taking samples of concentrates, it is convenient and time-saving. |
