360体育

  • <tr id='58an5'><strong id='oh0uf'></strong> <small id='lrox'></small><button id='bg6c5f'></button><li id='8958ou'> <noscript id='t535'><big id='9ytnv'></big><dt id='qto4w'></dt></noscript></li></tr> <ol id='8wj3u8'><option id='xp1nhi'><table id='1ct2k'><blockquote id='32nl5'> <tbody id='um4j'></tbody></blockquote></table></option></ol><u id='uiq984'></u><kbd id='9nplj'> <kbd id='atc8'></kbd></kbd>

    <code id='ixfko4'><strong id='k10njn'></strong></code>

    <fieldset id='tgxr'></fieldset>
          <span id='4u6g8'></span>

              <ins id='63eni'></ins>
              <acronym id='gn8aat'><em id='b2qg'></em><td id='uncuq'><div id='yjjds'></div></td></acronym><address id='qk5nss'><big id='xr8tk'><big id='r9bbh7'></big><legend id='c82k'></legend></big></address>

              <i id='0eslf'><div id='qsud'><ins id='zj1gz'></ins></div></i>
              <i id='qx8w'></i>
            1. <dl id='xkw4uk'></dl>
              1. <blockquote id='n7d0'><q id='tp1sa7'><noscript id='x2ab'></noscript><dt id='5q48ix'></dt></q></blockquote><noframes id='bwhsr9'><i id='cvrz'></i>
                 → Products
                High strength pre-tension yieldable bolt IⅠR 〔Patent pending〕
                High strength pre-tension yieldable bolt Ⅱ R 〔Patent pending〕
                High strength pre-tension bolt Ⅰ 〔Patent pending〕
                High strength pre-tension bolt Ⅱ 〔Patent pending〕
                Common strength pre-tension bolt Ⅰ 〔Patent pending〕
                Common strength pre-tension bolt Ⅱ 〔Patent pending〕
                INSTal Bolt
                Cable Bolts
                Cable Bolts

                High pre-tension spiral bolt

                High pre-tension snake bolt
                Post Grouting Bolt
                MechLok
                Friction-Lok Stabilizer
                All Thread Bar Bolt
                YIELD-LOK Bolt
                E-RAY Bolt
                Plate
                 → Contact
                Address:Jennmar Industry Park, Tongji Road, Gaoxin District, Jining, Shandong, China
                Tel:0537-2480366, 2480336
                Fax:0537-2480338
                Contact:Li Li
                E-mail:liliyf2@163.com
                Common strength pre-tension bolt Ⅱ 〔Patent pending〕

                                 

                 

                 

                 

                Technical Merits:

                 

                 

                 

                Application:

                 

                High pre-tension: Pretension is one of the most important factors to control the surrounding strata effectively. Facilitated with specially made torque-tension nut and “sandwich” harden washer system, this bolt can increase pretention by 30%-50% compared with other similar bolts.
                Equal strength: Using grade 350 rebar, specially treated thread reduces the steel working hardening and the thread part has the same strength as the rebar.

                 

                This bolt has been successfully applied in the mining of below 800 meters and the entry conditions of medium stress, without yield pillar trend, little dynamic stress.

                 

                 

                 
                Bolt type and physical properties
                Rocbolt Technologies China Ltd