您要查找的是不是：
- X80级 X80 grade
- X80级钢管 X80 grade steel pipe
- X80级管线钢 X80 pipeline steel
- X80级管线钢管 X80 grade pipeline steel pipe
- X80级Nb-Cr钢管 Nb-Cr X80 grade steel pipe
- X80级螺旋埋弧焊管 X80 grade SSAW pipe
- 通过夏比冲击试验和落锤撕裂试验(DWTT),测得国产X80级直缝埋弧焊接钢管低温韧性。 It obtains low temperature toughness of China made grade X80 LSAW pipe by Charpy impacting test and DWTT.
- 级联 connection
- 校级 field rank
- 英语四级 English Band 4
- X80 X80 grade
- X80钢 X80 steel
- 大学英语四级 College English Band 4
- X80管线 X80 pipeline
- 一级的 firstlevel
- X80钢卷 X80 plate coil
- 船级 ship' classification
- X80钢管 X80 steel pipe
- 三级片 third-grade film
- X80管线钢 X80 pipeline steel
