Siv Ib Cov Yeeb Nkab Hlau Rau Hauv Koj Tsev

Lub raj xa hlau yog qhov hollow tubular khoom. Ib hom yeeb nkab steel feem ntau yog siv hauv cov tsev lag luam thiab chaw lag luam, tab sis nrog ntau xyoo ntawm kev txhim kho thiab kev txhim kho raj xa dej, tam sim no nws yog siv dav hauv cov tsev nyob.

Nws keeb kwm tuaj yeem taug mus txog 2000 BC thiab maj mam dhau los ua ib qho ntawm cov kav dej txuas rau xyoo tas los no. Cov kav dej yog qhov pib zaws. Nws' s hauv av, vim nws cia li tsim koj cov yeeb nkab system.

Lawv siv rau cov kua thiab cov pa ntws, thiab lawv kuj tseem siv tau rau kev xa cov ntaub ntawv raw khoom hauv lub hoobkas.

Peb tseem tuaj yeem muab cov Seamless Steel Kav, Pre-Galvanized Steel Square Pipesetc. Txais tos tiv toj rau peb.