??? ??? ??? ?? 15??
??? ??? ??? ?? 60??
??? ??? ????? ?? 30?? ???
??? ??? ????? 34.2g ?? 30?? ???
? ???? ?????110gX10?+?????110gX10?
? ???? ???110gX8?+?????110gX8?
? ???? ???110gX8?+???86gX8?
??? ??? ???? ?? 30? ???
???
???? 2??? 20? ?????? 10? + ????? 10? ???????.