久久九九久精品国产首页_欧美日韩在线不卡高清视频_国产精品网曝门在线观看_P2020国产精品久久精品

    <ol id="lu3ax"><tbody id="lu3ax"></tbody></ol>
      熱線電話:021-54370211?    

    2-Mercaptobenzothiazole

    It is used mainly as a light agent for copper and copper.It has a good leveling effect.The usual dosage is 0.05 ~ 0.10 g/L.It can also be used as a bright agent for cyaniding silver, adding 0.5 g/L, to make the cathode polarization increase, and the silver ion crystallized to the silver layer.

    @ 2016 ShangHaiYaYu Biomedical co.,ltd TEL:021-54370211、54370255、54370355 FAX:021-54370255

    盱眙县| 竹北市| 聊城市| 天等县| 合江县| 罗江县| 陆川县| 长武县| 灵宝市| 昌黎县| 财经| 商丘市| 舒兰市| 伊宁县| 儋州市| 夹江县| 卢龙县| 孝感市| 郴州市| 石屏县| 新干县| 丰都县| 禹州市| 玛曲县| 禄劝| 霍邱县| 凤山县| 苏尼特左旗| 蚌埠市| 宜君县| 咸阳市| 新乡市| 正宁县| 兴安县| 肇庆市| 永和县| 鄂托克旗| 东乡县| 贵定县| 南投县| 盐山县|