flexible-lens gastroscope
活动透镜胃镜

• porch
• pore
• pore diameter
• pore structure
• porime focus
• poriness
• porosint
• porosity
• porosu solid
• porous
• porous cladding
• porous glass
• porous material
• porphyrin
• Porro prism
• Porro prism erecting system
• Porrotelescope
• port
• portable camera
• portable laser
• portable transit
• port-hole
• Portland cement
• portrait lens
• portraying atmospheric turbulence