UkuthethelelwaNgaphambi kokuthethelela ukucubungula, kudingeka ukuthi udlule kwinqubo, kufanele uhlole ikhwalithi yezinto zayo ezingavuthiwe, ukuze uqinisekise ukuthi izinto ezingavuthiwe azinazinkinga zekhwalithi ngaphambi kwenqubo elandelayo, manje sizobheka ukuthi yiziphi izidingo ezilandelayo.
一. Izidingo ezijwayelekile zeukuthethelelaAma-Raw material.
1. Ukwakheka kwamakhemikhali kuhlangabezana nezidingo.
2. Ukubhema, ukuphonsa, ukugoqa,ukuthethelela, ukuhlanza nezinye izinqubo zokukhiqiza zihlangabezana nezidingo.
I-3. Ikhwalithi ephezulu ihlangabezana nezidingo, akukho ukuklwepha, izikali, amafolda, imifantu nezinye iziphambeko (noma izinga lokuphikisana ngaphakathi kwebanga elivunyelwe), kwesinye isikhathi kufanele kususwe indawo evuthiwe ngokuphelele.
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二. Ukuhlolwa kweukuthethelelaIzinto ezivuthiwe ngaphambi kokushiya ifektri, umenzi kufanele ahlole ngokuvamileukuthethelelaIzinto zokwenziwa ezivuthiwe futhi uzinikeze imikhiqizo efanelekayo, kepha ifektri eyazisayo njengoba umsebenzisi kufanele afeze ukuhlolwa okudingekayo. Ukuthethelelwa kungahlonzwa ngocwaningo olujwayelekile noma isheke lendawo. Izinto zokuhlola zinganqunywa ngokuya ngohlobo lwezinto zokwakha kanye nokuthethelela izidingo.

1. Isampula yokwakheka kwamakhemikhali. Sebenzisa ukukhonjwa kwe-spark, ukungeniswa kwamabuzi kanye nokuhlaziywa kokubuka ukubheka ukuthi izinto zixubene yini.
2. Ukuhlola ukubukeka ukuthola ukuthi ingaphezulu linokulimala kanye nezinga lezici, nokuthi ngabe kukhona yini demomenon.
3. Bheka ukuthi impahla ihlangabezana nezidingo zosayizi nokuvukela kwesimo.
4. Bheka i-shrinkage cavity ne-post emhlophe ngaphakathi kwezinto ezibonakalayo ngokuhlolwa kwe-fracture; Ubucwebe obushisayo bento ethile bahlolwe ukuhlolwa kwe-thermacl fracture.
I-5. Ukuhlolwa kokufakwa kwe-macro kanye nokuhlolwa okuncane; Ukuhlukaniswa kweSulfur ngensimbi kuhlolwe ukuhlolwa kweSulfur Imprint kanye nendawo yayo yokuhlukanisa.
6. Bheka usayizi wokusanhlamvu ngama-microscope; Hlola isakhiwo se-metallographic.
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8. Bheka ukusebenza okucasulayo kwezinto ezibonakalayo ngokuhlolwa okucasulayo; Izakhiwo zemishini yokuhlola ngokuhlolwa kweTensile, ukuhlolwa kanzima, ukuhlolwa komthelela, njll.
9. Ukuhlolwa kobubanzi Njengoba kushiwo ngenhla, kuphela ngokuqinisekisa ikhwalithi yezinto zokwakha ezingavuthiwe esingakwazi ukwenza ngokuphepha ngokuphepha kokucucuza nokukhiqizwa okulandelayo, ukukhethwa kwazo zonke izinto eziluhlaza kubaluleke kakhulu.