discharger
/dɪsˈtʃɑːdʒə(r)/noun
1- a person or thing that allows something to flow out, in particular让某物流出的人（或物）, 尤指：
1.1
- a person or organization that allows industrial waste, sewage, or other harmful substances to be released into the environment（工业废物、污水或其他有害物质的）排放者; 排放机构。
1.2
- a device that releases nerve gas, smoke, or other substances for military purposes.（用于军事目的的神经毒气、烟雾或其他物质的）排放装置。
1.3
- an apparatus for releasing or neutralizing an electric charge.放电器; 火花隙。