Kev faib tawm cov chav huv

Cov txheej txheem ntawm cov chav huv
ISO Txheem: Tshaj tawm thoob ntiaj teb rau cov qauv ISO, nws tau muab faib ua 9 qib, chav kawm ntawv 7 yog sib npaug rau chav kawm ntawm chav kawm 1 thiab ISO 8, thiab chav kawm D ISO 8.
American Txuj Ci: Keeb Kwm Npaj Los Ntawm Tebchaws Meskas, nws tau muab faib ua 100, 10, {}}}}}}}}}}}
Tuam Tshoj GMP Txuj Ci: Lub GMP stipulates uas cov chaw ua haujlwm huv, thiab Chav Kawm C thiab D yog haum rau cov haujlwm qis.