polyalkyl methacrylate
聚甲基丙烯酸烷基酯

• hole basis
• hole-basis system
• hole burngin
• hole burning
• hole-burning effect
• hole-burning model
• hole carrier
• hole conductivity
• hole-couping
• hole density
• hole-drilling system
• hollow axle
• hollow-cathode
• hollow-cathode aluminum ion laser
• hollow-cathode copper halide laser
• hollow-cathode He-Cd laser
• hollow-cathode lamp
• hollow cylinder
• hollow dielectric wave guide
• hollow glass
• hollow prism
• hollow ryogenic target
• hollow shaft
• hollow spindle
• hollow tube mode