The product fabricated by the invention enables the printing layer to be covered on the interior of the outer casing, and the color of the printing image can keep bright and is uneasy to fade away.
本发明制作的产品，将印刷层包夹在外壳的内部，可保持印刷图文颜色鲜明，不易褪色。
2
The contractile interior core pulling mould structure was designed for the molding of the concave part of inner side of outer casing of flow meter.