无码人妻精品一区二区三区,久久人人做人人玩人人妻精品,日韩综合无码一区二区三区,人妻系列无码专区久久五月天,日本成片区免费久久

      <em id="xttbj"><pre id="xttbj"></pre></em>

        <address id="xttbj"></address>

            <address id="xttbj"><listing id="xttbj"><meter id="xttbj"></meter></listing></address>
              <address id="xttbj"></address>

                  More than 160 invention patents, utility models and appearance patents.
                  R&D team of 48 senior experts with 26 years of working experience in this field.
                  Innovation never stops, constantly breaking through industry technical standards:
                  1, The gas test is upgraded from 3.3 meters bending ≤500PPM to 5.3 meters bending ≤300PPM.
                  2, The life test of continuous burning is upgraded from 8 hours to 12 hours.
                  3, The durability test has been upgraded from 50,000 times to 100,000 times.
                  4, With 27 years of industry accumulation, we have big data in the complex environment of the country, and can develop products targeted at different regions to form a wide range of product coverage capabilities.
                  5, DC upper draught type gas water heater has been made to 18L, breaking industry limit, and setting a new benchmark.
                  • 6Million+
                  • 3Million+
                  • 3Million+
                  • 2Million+
                  • 60000
                  • 800+
                  • 75+
                  • 100Million+
                  Contact Us
                  • 0760-22603868
                  无码人妻精品一区二区三区,久久人人做人人玩人人妻精品,日韩综合无码一区二区三区,人妻系列无码专区久久五月天,日本成片区免费久久

                      <em id="xttbj"><pre id="xttbj"></pre></em>

                        <address id="xttbj"></address>

                            <address id="xttbj"><listing id="xttbj"><meter id="xttbj"></meter></listing></address>
                              <address id="xttbj"></address>