こう高度 こうど放電 ほうでん発光 はっこう
kō kōdohōdenhakkōde

Noun
Da Copula

て-form: Used to connect clauses, make requests, or chain actions of 高高度放電発光

1. High-altitude discharge luminescence ; Using high-altitude discharge luminescence; By means of high-altitude discharge luminescence

Te-Form