SDI ENG Co., Ltd.
"Q" mark (Quality guarantee) by Korea inspection institute of machinery-meter & petro-chemical which is the specialized institute for quality inspection.Joiltly edveloped by Korea institute of energy resource- Korean Patent No.049145- Korean Patent No. 091089- Chinese Patent No. ZL 931 1 44698- Selected as a Hopeful M & S enterprise by KPRRI- Recommended for priority to examine by KEPA
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