Only we have to add color but for which we do not want a dosing unit with it 我们只需要调配颜色但我们不想要使用定量添加设备来加颜料。
2.
Its surface could be made very smooth and its coler could be cor - dinated with its using environ - ment . its surface coating contains anti - ultraviolet matter which helps to prevent color tading 外表可制得非常平滑，可与环境配合调配颜色，表面含有抗此外光剂，有助于防止褪色。
