pre-combustion

not-comparable

Occurring prior to combustion. / Concerned with a phase prior to combustion.

Japanese Meaning

燃焼が始まる前の / 燃焼前に発生する

The researchers analyzed pre-combustion emissions to identify which compounds formed prior to ignition.

研究者たちは燃焼前の排出物を分析して、点火前にどの化合物が生成されたかを特定した。

Sense（1）

Occurring prior to combustion.

pre-combustion decarbonization

Sense（2）

Concerned with a phase prior to combustion.

pre-combustion chamber