?????：??? ??? ?????? ??? ??? ??????? ????? ????. ????? ????????, ??? ???????? ?????? ????? ?????? ??? ???? ???? ??????, ???? ????? ?????? ?????. ?????? ??? ??????? ????? ???? ??? ???? 30-40 ???? ???? ????? ????????,
??? ??? ?????? ??? ??? ??????? ????? ????. ????? ????????, ??? ???????? ?????? ????? ?????? ??? ???? ???? ??????, ???? ????? ?????? ?????. ?????? ??? ??????? ????? ???? ??? ???? 30-40 ???? ???? ????? ????????,
????? ???? ??????? ??? ?? ???? ?????. ???? ????? ???? ?????? ?? ??? ?? ?? ????? ????? ??? ?????. ???? ???? ??? ????? ???? ????? ????? ???. ????? ?? ??? ???? ??????? ??? ??????? (??????: 2,000 ??? ????):
????? ??????
1. ???? ????? ???
?? ?????? ??? ???? ?????? ??????? ?????? ???, ??? ?????, ??? ???, ??? ???'. ????? ????? ????? ?????.
2. ????? ????
??? ???? ????? ???? ????? ???? ????? ?/?? ????. ??? ????? ?????? ????? ???
1) **????? ????**
???? ????? ???????? ??? ???? ????. ????, ????, ????? ????? ?????? ?? ??? 1 ?-1.14 ??"?, ??'?????? ??? 0.8 ?-1 ??"?, ?????? ????, ?????? 1.
2) **????? ???**
????? ???? ?? ?????? ????? ??? ????? ????. ????, ???? ???? ?????? ???? ??? 5-6 RMB.
????? ????
????? ?-COVID-19, ????? ?????? ?????? ?????? ?????? ?????? ?? ????? ????? ???, ??? ????? ???? ????? ?????? ?????? ?? ????.
?? ?? ??????????? ?? CAN (ChinaAggregatesNet, www.caggregate.com), ????? ?????? ?? ???? ?????? ???? ?????? ??? 99.37 ???? / ???.
????? ?? 100 RMB ????, ????? ???? ?????? ??? ??? ?? ??? ???? ??? ?????, ??? ????? ???, ????? ????, ????? ??? ??????? ?????, ??? ????? 50 RMB.
???, ???? ???? ?? ????? ???? ?? 2000 ???, ?? ????? ???????!
???? ???? ????? ????? ?????? ??? ?? ????? ???? ?? 2000 ????
????? ??????, ????? ?????? ????? ???, ????? ???? ???? ???? ????? ??? ???. ??? ????? ??? ?? 2,000 ??? ???? ???? ?????? ????? ??????. ???? ??? ?? ?? ???, ?????? ???? ?????? ???? ?????????:
?????? 1: ?????? ????? ????????-???? ???? ??? ??? ????????
?????: ???? ??? ZSW, ?????? ???? PE, ????? ????? ??? ???? VSI6X, ??? ??? S5X*2
??????? ????? ????? ??. ???? ???, ???? ?????? ????? ????? ???? ?-30 ?"?. ?? ???? ???????? ?? ??????? ???????? ???? ???, ?????? ????
?????? 2: ?????? ????? ???? ???? ???? ???, ???? ???????
?????: ???? ??? ZSW, ????? ??? PE, ????? ????? ??-????? HST, ????? ????? ??? VSI5X, ??? ??? ???? Y
??? ???? ???? ?? ??? ?? ?? ?????, ????? ?????? ??? ???? ???? ???? ????. ??? ??? ?????? ?? ?????? ?? "????? ??? + ????? ????" ????? ??????? ????? ????.
???? ????? ????? ?? ???? ?????? ???? ????? ??? ?? 2,000 ??? ????. ????? ???? ?? ???? ????? ????????, ??? ??? ???.
?????
??? ?????