研制过程 yán zhì guò chéng

DEFINITIONS

  1. manufacturing environment

CHARACTERS

研 yán
HSK 4
grind, rub; study, research
制 zhì
HSK 5
system; establish; overpower
过 guò
HSK 2
pass, pass through, go across
程 chéng
HSK 4
journey, trip; schedule, agenda