??????????????????
????????????????ACCC??????????????????????????????.?????2013?2?15???????????????????????????????????????????????ASTM????2012??????F977-12?????????????????
????????????????2014?3?31???????????????????????13????????????????????????2000??2012??ASTM F977???????????2014?4?1???????2012??ASTM F977????????????????????????
???2012??ASTM F977??????????????????2000??2012??ASTM F977????????2012????
?????????????????ASTM F977-12?7.3??
???????????????????ASTM F977-12?7.6??
????????????????????ASTM F977-12?8.2??
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