标准
ASTM D4671-1999ASTM D4671-16 Standard Test Method for Polyurethane Raw Materials: Determination of Unsaturation of Polyols
http://bbs.infoeach.com/thread-187751-1-1.html
http://bbs.infoeach.com/forum.php?mod=viewthread&tid=187759&extra= ASTM D4671-99 Standard Test Methods for Polyurethane Raw Materials: Determination of Unsaturation of Polyols
页:
[1]