ASTM A333 ASTM A106 / A53 / API 5L GR.BX46, X52 Q345D, Q345E) 1. Umumy maksatly polat turba ASTM A53 GR.B, polat belgisi: SA53 B, aýratynlyklary: 1 / 4′-28 ′, 13.7-711.2 mm 2. temperatureokary temperatura amallary üçin bökdençsiz polat turba ASTM A106 GR.B, polat belgisi: SA106B, spes ...
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