**PLUMBING**

PI : Draw Pipe

MS : Mechanical Settings

SL : Split Element

PX : Plumbing Fixture

PA : Pipe Accessories (พวก Valve ต่าง ๆ)

**MECHANICAL**

AT : Air Terminal

ME : Mechanical Equipment

DT : Draw Duct

DA : Duct Accessories

FD : Flex Duct

DF : Duct Fitting