PETRO-INSTRUMENTS CORP., LTD.
PETROPLUS ENERGY CO.,LTD.
PRASERTSOMBAT & SON CO LTD
PRECISION GEARTECH (THAILAND) CO.,LTD.
PRECISION TOOLING SERVICES CO., LTD.
PREMIER TECH SYSTEMS AND AUTOMATION CO LTD
PREMIUM PLM (THAILAND) CO., LTD.
PROCESS TECHNOLOGY AND SERVICES CO LTD