梯形

• Hexagonal nuts ; rounded acme thread
  六角头螺母.圆的梯形螺纹
• Stub acme thread on stem provides rapid open - close operation
  阀杆上的短梯形螺纹适用于快速启闭操作。
• Resonant characteristics of a trapezoid meander line monopole antenna
  梯形弯折线单极子天线的谐振特性
• Trapezoid corrugated plate seperater
  梯形波形板分离器顶帽
• Trapezed steel wire for spring washer
  弹簧垫圈用梯形钢丝
• Rubber synchronous belt of stepped teeth
  梯形橡胶同步带
• The paper presents the trapeziform chart for production line controlled
  论文提供了生产线的控制梯形图。
• Standard test method for trapezoid tearing strength of geotextiles
  土工织物的梯形抗扯裂强度的标准试验方法
• Internal combustion engines - piston rings - half keystone rings made of steel
  内燃机.活塞环.钢制半梯形环
• Trapezoid back very ram extension , manufacturing processes facilitate ; 2
  1 .梯形爪极冲压引伸，制造加工方便