<del id="ttvv9"></del>
                <pre id="ttvv9"></pre>

                  <del id="ttvv9"></del>
                  Medical material grade butyl rubber
                  With its excellent air tightness, heat resistance, chemical resistance, ozone aging resistance, good vulcanization performance and compatibility. It is widely used in the production of medical rubber stoppers and medical equipment products.
                  影音先锋AV网,久久亚洲一区二区,自拍网站一区,国内精自视频品线二三区,国产精品久久久久久久久久久

                          <del id="ttvv9"></del>
                                <pre id="ttvv9"></pre>

                                  <del id="ttvv9"></del>