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