complementary
(1)余，补
(2)补充的，互补的
(3)互助的
(4)并协的

• pressure gage
• pressure gradient
• pressure marks
• pressure ocmpensator
• pressure of liht
• pressure plate
• pressure point
• pressure polish
• pressure reducer
• pressure relief value
• pressure shift
• pressure vacuum gage
• pressure washer
• pressure-welded junction
• pressur of laser light
• prestage
• prestor
• prestress
• prestting
• prethreshold
• prethreshold phenomean
• pretreatment
• pretrikgger
• preventer
• prfocus lamp base