密封輻射源 mì fēng fú shè yuán

DEFINITIONS

  1. sealed radiation source

CHARACTERS

密 mì
HSK 4
dense, thick, close; intimate
封 fēng
HSK 4
letter, envelope; feudal
輻 fú spokes of wheel
射 shè
HSK 5
shoot, eject, issue forth, emit
源 yuán
HSK 5
spring; source, head; surname