1. Txiav tsis kam yog loj heev
Lub npe hu ua ntau dhau los ntawm cov sawing tsis kam txhais tau hais tias nyob rau hauv cov txheej txheem sawing, qhov sawing yog qhov hnyav, qhov pub mis yog qhov hnyav, qhov pom tsis nkag rau, tus cuam tshuam, thiab cov saw tsis noj. Qhov laj thawj yog ntau lub zog, uas yuav ua rau lub saw hla dhau loj lossis Loj, me me ntawm txoj kev saw tsis ncaj, tsis tuaj yeem txiav ntug lossis tsis tsim nyog ntawm cov hniav lub kaum sab xis, qhov tsis sib haum me me, thiab pom lub cev tsis sib xws yuav ua rau pom kev tiv thaiv ntau dhau.
2. Qhov pom ntawm qhov chaw tsis yog tus qauv sab hauv thiab sab nraud
Cov hlua khi hniav tsis ua raws li txoj kab ncaj nraim thaum lub sijhawm pom txheej txheem, thiab lub puab cov hniav sab hauv thiab lub nruas sab nraud tuaj yeem lav tsis tau qhov zoo ntawm cov ntoo sawn. Qhov no tshwm sim los ntawm kev tsis sib haum ntawm ob sab ntawm cov tog hniav lossis tsis pom lub cev tsis sib xws. Yog tias pom cov hniav muaj qhov loj sab nraud thiab qhov me me sab hauv, qhov cov hniav pom yuav qaij mus sab nraud tom qab kev ntxhov siab, yog li lawv yuav loj dua, thiab rov ua dua. Yog hais tias sab hauv ntawm pom lub cev tsis sib xws thiab kev sib txhuam tsis kam nrog cov khoom nto yog loj, nws tseem yuav ua kom dav. Ntawm qhov tsis tooj, rub me me. Yog tias qee zaum nthuav dav, qee zaum me me, txoj kev pom tsis ncaj, thiab sab hauv thiab tawm ntawm txoj kev tsis ncaj, nws tshwm sim los ntawm qhov tsis sib luag tsis sib luag, xoob pem hauv ntej lub qhov ncauj, xuav sab hauv thiab sab nraud ntawm seem pom, lossis tsis zoo pom cov hniav. Cov khoom siv, cov hniav chipping, cov khoom ya, thiab lwm yam.
3, pom cov hniav tsis ua haujlwm zoo
Pom cov hniav khiav tsis zoo, muaj ntau tus ntiv tes pom hniav tsis tuaj yeem ua haujlwm, channeling thiab poob tawm, thiab lwm yam vim li cas lub ntsiab yog tus caj qaum tig tsis ncaj, uas yog, pom rov qab yog tsis ncaj tsis khov, lossis pom cov hniav tsis sib xws , daim ntaub thaiv tsis ruaj, thiab lub nro tsis sib haum. Yog tias thaum pom lub txheej txheem, cov hniav sib xyaw ceev tam sim ntawd khiav tsis zoo, tshee thiab sways, thiab ua lub suab tsis meej, nws yog qhov taw qhia tias cov hniav tawg tuaj yeem tsoo, thiab kev ntsuas thaum muaj xwm ceev yuav tsum ua tam sim ntawd los nres qhov kev kuaj xyuas.
4, pom cov hniav tawg
Cov saw hniav tawg ua rau muaj qhov tsis xws ntawm lub thev naus laus zis pom, cov tawg yog feem ntau nyob ze rau ntawm tus hniav, hu ua hniav tawg, thiab cov kab tawg yog feem ntau nyob hauv tus hniav rov qab, hu ua tus hniav rov qab tawg, thiab cov kab nrib pleb yog feem ntau yog mloog zoo ntawm sab pem hauv ntej sab nraub qaum lossis sab qaum ntawm lub cev saw. Nws yog hu ua anterior rib cleft lossis posterior kaum kev tsaj. Cov kab nrib pleb feem ntau yog nyob nruab nrab ntawm qhov pom ntawm lub cev thiab yog hu ua cov khoom tawg sab hauv. Cov kab nrib pleb hauv qhov sib koom ua ke yog hu ua kev sib txuas tsis ua tiav kev sib tsoo. Tsis tas li ntawd, muaj cov kab nrib pleb tsis tu ncua, uas yog, kev faib khoom tawg yog qhov tsis xwm yeem.
5. Cov saw hniav" hluav taws kub"
Thaum lub sijhawm ua haujlwm ntawm lub tshuab ua haujlwm tau pom lub tshuab, cov saw hniav dheev tsoo thiab ua lub suab nrov heev. Lub tshuab pom feem ntau hu qhov xwm txheej no raws li cov saw hniav" hluav taws kub." Pom hniav tawg" hluav taws kub" tsis tsuas yog khib nyiab lub kaw hniav, tab sis kuj tsim kev puas tsuaj rau lub tshuab sawing, cuam tshuam rau ntau lawm. Hauv cov xwm txheej loj, lub neej thiab kev nyab xeeb ntawm cov tshuab sawing yuav raug puas tsuaj, thiab kev saib xyuas txaus yuav tsum tau them nyiaj.
