Cov ntaub ntawv haum rau kev tsoo muaj raws li hauv qab no:
1. Ntau yam ntim hollow ntim: yas ntim cov kaus poom yas, cov thoob yas, hlau tuav, thawv ntim khoom, ntim ntawv ntim.
2. Nkim khoom siv hauv tsev: chav ua yeeb yaj kiab, tshuab ntxhua khaub ncaws, lub plhaub txias.
3. Cov kav dej: cov kav dej loj, cov yeeb nkab fittings, PE kav dej.
4. Cov qauv khib nyiab: ntoo pallets, yas pallets, forklift pallets.
5. Cov log tsheb tsis huv: cov log tsheb, lub log tsheb.
6. Seem hlau: tsheb plhaub, alloys alloys, seem ntawm txhuas qhov chaw, lub plhaub cav, ua rau, thiab hlau daim hlau nrog cov tuab tsawg dua 5 hli.
7. Cov zaub mov pov tseg, cov khib nyiab hauv tsev, tsiaj tuag tsiaj, RDF cov khoom siv, khoom siv kho mob, hluav taws xob roj ntoo, cov khib nyiab hauv vaj.