您要查找的是不是：
- 梯形trapezoid
- 梯形的trapeziform
- 梯形圖ladder diagram
- PWMPWM ( Pulse Width Modulation)
- 雙PWMdual-PWM
- 等腰梯形isosceles trapezoid
- PWM波PWM
- ZVS-PWMZVS-PWM
- 梯形花園a terraced garden
- ZVT-PWMZVT-PWM
- 阿克姆梯形扣絲錐tandem ACME tap
- 混沌PWMchaotic PWM
- 梯形花樣的刺繡ladder stitch
- 數字PWMdigital PWM
- 調節梯形角度Adjust keystone angle
- PWM控制PWM control
- 沖積而成的梯形平原depositional terrace plains
- PWM整流PWM rectifier
- 梯形飛行隊以此方式編排的飛行隊形A flight formation or arrangement of craft in this manner.
- 載波PWMcarrier-based PWM
