Kev faib tawm tseem ceeb ntawm cov kav dej

1. Muab faib los ntawm cov khoom siv: cov kav hlau hlau thiab cov kav tsis yog hlau.
2. Muab faib los ntawm kev tsim siab: lub tshuab nqus tsev, cov kav dej tsis tshua muaj siab, cov kav dej siab siab, cov kav dej siab ultra-siab.
3. Classified los ntawm conveying kub: tsawg kub pipeline, ib txwm kub pipeline, nruab nrab kub thiab siab kub pipeline.
4. Muab faib los ntawm kev thauj khoom nruab nrab: cov dej xa dej thiab cov kav dej, cov kav dej compressed, hydrogen pipeline, oxygen pipeline, acetylene pipeline, thermal pipeline, gas pipeline, roj pipeline, high toxic fluid pipeline, toxic fluid pipeline, acid-base pipeline, boiler pipeline, tub yees pipeline, purified gas pipeline, ntshiab dej pipeline.