??????????????19.72???

????:???????:????sn????

??????????????2???????5??? (?????????????? ????)??8????????????5??,????????????????,???,?????????????????????1512???????????,??19.72??????????,??1436??????????????????????????????,??18.98??,2??????????3????,??2.65????,????

?,???????????,????????????????????????????????????????????????????????????,???????,????????????????????????,????????????????????,??????????????,????????????????

???????????????????,??,????????????????????,???????????????????,???????,?????,100%???,???????????????????????????????????(??????) ???:???