Da farko dai, ga abubuwan da suka shafi daban-daban da bukatun masana'anta don zaɓar dacewacam kwana. Saboda mai zanen kayan masana'antar bi, daban-daban girmamawa, don hakacam Yi aiki a farfajiya zai zama daban.
Saboda allura ko mai zunubi dacam Alamar dogon lokaci na babban tashin hankali, mutum na mutum na mutum a lokaci guda kuma dole ya tsayayya da babban tasiri -itoci, don hakacam Zabi na tikitin ƙasa na ƙasa CR12mov, kayan aiki ne mai ƙarfi, ɓarna mara kyau, ƙarfin wuta, ƙarfi, ƙarfi ya fi dacewa dacambukatun.cam Harshen wuya gabaɗaya ne na kullun hrc63.5±1. cam Hardness ya yi yawa sosai ko kuma ya kasance ƙasa da illa mai illa.
cam Matsakaicin surface Matsakaicin yana da matukar mahimmanci, da gaske yana ƙayyade kocam yana da kyau da dorewa.cam curve surface m, ne ta hanyar sarrafawa, kayan aiki, sarrafa fasaha, yankan da sauran abubuwan da suka yanke (mutum)cam Farashi ya ragu sosai, yawanci a wannan mahadar yin labarai).cam aikin gona da kuma m an ƙaddara a matsayin Ra≤0.8um. Ba a aikata m farfajiya ba zai haifar da babban diddige diddige, buga allura, buge da allura, dake dumama da sauran abin da aka yi.
Bugu da kari, amma kuma kula dacam Matsayi na rami, keyway, siffar da kuma tsayayye na dangi matsayin da daidaito, waɗannan kulawa ba na iya samar da tasirin illa.