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DELC ??? LC ???
?? 9??? LC ??? LC ???? ??? ??? ??.
?? ???? LC ??? LC ???? ??? ??? ??? ????: ?? ? ???.
British Standards Institution (BSI), LC ??? LC ???
SCC, LC ??? LC ???
International Organization for Standardization (ISO), LC ??? LC ???
PL-PKN, LC ??? LC ???
未注明發(fā)布機(jī)構(gòu), LC ??? LC ???