wash primers

用法例句

Manufacturing of new base paste solves key topics in replacement of imported phenoplastic paper plywood by domestic one in production of potentiometers and improves forming technology and intrinsic quality of base carbon film in composite potentiometer

新型底层浆料解决了进口酚醛层压纸胶板国产化代用的关键问题，同时对合成碳膜电位器碳膜片底层的成膜工艺进行改进，提高了碳膜片的内在质量。