ท่อเข็ม : เกรด A เป็นกันเอง
????? ???????????/???????????/??????? ??? ??????
?????????????? ???????????/???????????/??????? ????????? ????????
??? ???????????
??????????/?????????/?????????????? ???????????/???????????/??????? ????????????/???????????????/?????
??????????/??????????| ???????????/???????????/??????? ???