您要查找的是不是：
- L245A級鋼管L245A-pipe
- X65級鋼管X65 grade steel pipe
- X80級鋼管X80 grade steel pipe
- JP級鋼管磷化的研究PHOSPHATIZATION OF JP GRADE STEEL TUBE
- 鋼管steel tube
- 級聯(lián)connection
- 大學(xué)英語(yǔ)四級College English Band 4
- 船級ship' classification
- 鍍鋅鋼管galvanized steel tube
- 三級片third-grade film
- 無(wú)級stepless
- 焊接鋼管welded steel pipe
- 級配graduation
- 他將望遠鏡收進(jìn)一根鋼管內。He slipped the telescope into a steel tube.
- 第二級secondary
- 大學(xué)英語(yǔ)六級考試CET-6 [College English Test, Band Six]
- 鋼管里塞滿(mǎn)了臟物。The steel tubes were clogged with dirty matters.
- 第一級first step
- 鋼管樁steel pipe pile
- 工業(yè)級technical grade
