Whiworth standard screw thread
惠氏标准螺纹

• cadmium red line
• cadmium selenide
• Cadmium Sulfide
• Cadmium Sulfide cell
• calcite
• calcite interference microscope
• calcium containing silicate oxyapatite laser
• calcium fluoride
• calcium-fluoride laser
• calcium-fluoride reflection conefficient
• Calcium Tungstate
• calcium-yttrium silicate oxyapatite laser
• calcogenide glass
• calc-spar
• calculating machine
• calculation
• calculation program
• calculator
• calculus
• calculus of differences
• calculus of variations
• calender
• caliber
• caliber gauge
• caliber square