1. Qhib lub hwj chim saib seb lub kauj tsheb puas yog.
2. Thaum hloov lub cuab yeej, riam ntug txuas tawm ntawm lub dav hlau ntawm lub taub hau cutter los ntawm 2-4 hli, thiab tom qab ntawd nruj nreem ntsia liaj qhov rooj. Yog tias pom tias cov xov hlau ntsia hlau tau hnav, nws yuav tsum tau hloov tam sim ntawd kom tsis txhob muaj kev puas tsuaj rau lub taub hau zawv zawg.
3. Txhawm rau hloov qhov txuas ntxiv ntawm rab riam, qhov ntev ntawm rab riam txuas ntxiv yuav tsum yog tib yam.
4. Los ntawm kev kho qhov ntev ntawm rab riam, thaum cov khoom tsis zoo, hloov lub sieve nrog apertures sib txawv.
5. Nws yog nruj me ntsis txwv tsis pub muab hluav taws nrog cov pob zeb thiab cov ntsia hlau rau hauv lub tshuab kom tsis txhob muaj kev puas tsuaj rau cov riam thiab cov khoom sab hauv.
6. Ua tib zoo xyuas cov rauj bolts thiab ceev ceev tam sim yog tias lawv pom tias xoob. Thaum cov hammers thiab bolts tau hnav hnyav, lawv yuav tsum tau hloov.
7. Lub tshuab siv tsis tau hloov lub zog thiab ceev, thiab lub kaum sab xis ntawm cov riam ntse tuaj yeem khaws cov kab ncaj nraim ntawm 28-30 degrees.
8. Txhawm rau hloov cov khoom, nws yog qhov yuav tsum tau hloov cov hniav thiab kho cov riam tib lub sijhawm. Qhov tsawg kawg nkaus qhov ntawm cov hniav yog tsis tsawg tshaj li 14mm (inch) thiab qhov siab tshaj plaws yog tsis ntau tshaj 20mm (inch). Qhov ntev ntawm cov hniav yog nyob nruab nrab ntawm 3-6mm, thiab qhov sib txawv ntawm cov hniav hauv qab thiab cov hniav tsis ntau tshaj 1 hli.
9. Cov hmoov ua haujlwm yog granulated nrog ntoo nrog txoj kab uas hla ntawm 3cm-20cm lossis tsawg dua.
