???? ??? ??????????? - ?? ??
???????????(HEC)? ??? ???? ??, ??, ??? ???? ?? ???? ??? ???? ????? ??????. ??? ??? ???? ????? ??? ??? HEC? ??, ??, ?? ????? ??? ??? ??? ???? ?? ??? ??????. ?? ??? ? ?????(Zhejiang Haishen New Materials Co., Ltd.)? ??? ??????????? ??? ???? ??, ??? ??? ??? ??? ??? ??? ??? ?????. ? ??? ??? ???? ???? ???? ?? ??? ???? ??? ??? ?? ???? ????? ???? ??????. ??? ?????? ???? ?? ??? ? ?????(Zhejiang Haishen New Materials Co., Ltd.)? ??? ??? ???? ??? ?? ??? ??? ? ?? ???? ?????. ?? ???? HEC? ???? ??? ???? ???? ??? ??? ?????.
