Dhau ISO9001 daim ntawv pov thawj kev tswj hwm zoo, ISO14001 ib puag ncig kev tswj hwm daim ntawv pov thawj, thiab OHSAS18001 tsim daim ntawv pov thawj kev ua haujlwm noj qab haus huv thiab kev nyab xeeb.
