Lub tshuab sieve sub-machinery yog ib hom tshuab tshiab uas tau tsim kho sai heev hauv 20 xyoo dhau los. Nws tau siv dav hauv metallurgy, cov ntaub ntawv tsim kho, tshuaj lom neeg, khoom noj, kev khawb av thiab lwm yam lag luam, tshwj xeeb tshaj yog cov lag luam khawb av thiab hlau.
Hauv kev lag luam hlau, lub tshuab tshuaj ntsuam tuaj yeem siv rau kev ua kom zoo dua, xws li kev tshuaj ntsuam cov hlau thiab coke; hauv kev lag luam thee, nws tuaj yeem siv rau kev faib tawm, kev qhuav dej, kev tshem tawm cov thee, thiab lwm yam; hauv kev tsim kho, cov ntaub ntawv siv hauv tsev, dej fais fab, kev thauj mus los, thiab lwm yam. Cov pob zeb tuaj yeem raug txheeb xyuas; hauv kev lag luam lub teeb thiab kev lag luam tshuaj lom neeg, cov ntaub ntawv raw tshuaj lom neeg thiab cov khoom lag luam tuaj yeem raug tshuaj ntsuam.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-20-2019