In the lobed impeller the measuring chambers are the space between the lobes and the meter housing. 葉輪式測量室是葉輪和流量葉殼體間的空間。
The trigger wheel rotates with engine RPMs and causes the speed sensor, or pickup oil, to produce triggering voltage pulses that correspond to engine speed and piston position. 觸發葉輪隨發動機轉速而旋轉，使得轉速感測器或拾波線圈產生與發動機轉速和活塞位置相對應的觸發電壓脈衝。
The sky overhead is an eight-spoked prayer wheel and the ground below an eight-petalled lotus. 天如八幅輪，地如八瓣蓮，吉祥無比。
