purification

purification agent

[化] 油田水净化剂

purification of gas

[化] 气体净化

purification pool

[化] 净化池

purification tower

[化] 净化塔

purification treatment

[化] 净化处理

purifications

(purification 的复数) n. 纯化, 提纯, 涤罪
[化] 提纯