(1) Qhov tseeb ntawm cov qauv kev taw qhia txog cov pwm. Kev cob qhia zoo thiab txhim khu kev qha yog qhov zoo tshaj hauv kev txo cov pwm ua hauj lwm thiab tsis txhob muaj kev tiv thaiv kab mob hauv cov rooj sib txoos thiab cov khov hlua khi, tshwj xeeb tshaj yog thaum tsis muaj qhov tsis sib txawv thiab me me ntawm qhov chaw sib tw, kev sib xyaw thiab ntau txoj haujlwm hnyav. Yuav kom txhim kho lub neej ntawm pwm, qhov tsim yuav tsum yog raws li qhov xwm txheej ntawm cov txheej txheem thiab qhov tseeb ntawm qhov chaw, thiab xaiv qhov tseeb ntawm daim ntawv qhia thiab qhov tseeb ntawm tus qauv kev taw qhia yuav tsum raug txiav txim siab. (2) tuag (convex, concave tuag) ntug geometry. Cov duab ntawm lub rooj sib xyaws thiab cov khoom khov ua ke, qhov sib haum kom zoo, thiab lub vojvoog ntawm cov fillet tsis tsuas yog muaj kev cuam tshuam ntau ntxiv rau hauv seem stamping, tab sis kuj muaj kev cuam tshuam zoo rau kev hnav thiab lub neej ntawm cov pwm. Piv txwv li, qhov pwm ntawm cov pwm ncaj qha cuam tshuam rau qhov tsis zoo thiab tuag taus lub neej. Rau cov neeg raug cai dua, qhov sib txawv me me nqi yuav tsum raug xaiv nyob rau hauv tus tsim; txwv tsis pub, khoob yuav ua kom tsim nyog nce ntxiv kom tuag taus lub neej.
pwm lub neej yog nyob ntawm qhov tsim
Apr 17, 2018
Tso lus