循环泵

自行车打气筒把空气打进轮胎里。

当总循环泵变速运行时，各个支路的流量分配比例保持不变。

Hamiltonian cycle

bead diameter at rim seat of cycle tyre【橡胶】

sexual response cycle

Krebs cycle

canned cycle

dot cycle

liquefaction cycle with single throttling【制冷】

centrifuging cycle