bore target centering fixture
孔[目]标定心夹具

• politure
• polka-dot method
• pollutant
• pollution
• pollution control
• poloidal field
• poloniqum
• polsihed-barrl-rod
• polsihing felt
• polsihing lap
• polyalkyl methacrylate
• polyallyl metacylate
• polyamide
• polyatomic
• polyatomic chemical laser
• polyatomic system
• polycarbonate
• polychormism
• polychroism
• polychromatic
• polychromatic field
• polychromatic light
• polychromatic radiation
• polychromatic radiator
• polychromatic source