极品尤物白丝自慰正在播放,JK白丝极品被CAO到流水呻吟,JK制服白丝自慰无码自慰网站

      <nobr id="npf3f"></nobr>

      <menuitem id="npf3f"></menuitem>

      <nobr id="npf3f"><delect id="npf3f"></delect></nobr>

      <menuitem id="npf3f"><delect id="npf3f"><pre id="npf3f"></pre></delect></menuitem>
      <menuitem id="npf3f"></menuitem>

          <span id="npf3f"></span>
          <nobr id="npf3f"><thead id="npf3f"><listing id="npf3f"></listing></thead></nobr><b id="npf3f"><delect id="npf3f"></delect></b>

            <menuitem id="npf3f"></menuitem>

              About TR

              Founded in 1979, Dongguan TR Bearing Co.,Ltd is now located in No.3, Jinfu Er Lu, Huanan Industrial Park, Liaobu Town, Dongguan, covering an area of 60,000 m.Specializing in ball bearing units, we have leading procedures of heat treatment, grinding and assembling, along with comprehensive and precise testing technologi…

              Technical level Quality

              公司先后購進205、206、208、210等磨超自動生產線六條,并將各生產車間的磨削超精加工廢液進行集中處理

              Our technological center lab was awarded with CNAS Certificate

              Bearing knowledge

              帶座外球面球軸承特點

              帶座外球面球軸承是將滾動軸承與軸承座結合在一起的一種軸承單元。大部分外球面軸承都是將外徑做成球面,與帶有球狀內孔的進口軸承座安裝在一起,結構…

              軸承的選用:

              軸承尺寸的選擇主要是根據軸承所承受的載荷,軸承的壽命及可造性等要求進行?;绢~定載荷是用來評定軸承承載能力的技術指標,基本載荷包含XXX。

              軸承的安裝與固定:

              滾動軸承在安裝之前,應先對與之配合的軸、殼體孔、端蓋等零件進行嚴格檢驗。對使用過的軸不合要求的零件應予以修復或更換。否則,不允許裝配

              Hotline

              Contact TR

              Please note:The products are in strict accordance with the national standards or industry standards for manufacturing our website, our catalogue contains very detailed product information, you can by telephone, fax or e-mail, QQ way to the TR company sales dep…
              Products
              极品尤物白丝自慰正在播放,JK白丝极品被CAO到流水呻吟,JK制服白丝自慰无码自慰网站 秋霞理论在一L级少妇人妻a片,秋霞鲁丝片AV无码少妇,琪琪777午夜理论片在线观看播放| 特级牲交大片,日本牲交大片无遮挡,看大片人与拘牲交| 欧美三级不卡在线播放,国产三级视频在线播放线观看,性刺激的欧美三级视频中文字幕