Gate Valves factory ?? ????????????????????????????????????????????????????????? 1.OS&Y??????????????2.??????????? 3.???????4.?????5.??????6.?????????7.??????????????? ?????2"~48" (DN50~DN1200?/p> ?????Class150~2500?N10~PN420?/p> ???API 600?API 603?ASME B16.34??????C6?WC9?C5?C12?C12A?F11?F22?F51?F91???F?RTJ?BW???????????????? ??????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????http://www.jitaivalvegroups .com/??/ ????????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????http://www.jitaivalvegroups .com/??/ ????????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????http://www.jitaivalvegroups .com/??/
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