防线

防線
fángxiàn
defensive line or perimeter

classifier: 道

CEDICT

Entry Composition

1 防 fáng
  1. to protect
  2. to defend
  3. to guard against
  4. to prevent
=2 线 xiàn variant of 线 xiàn
=2 线 xiàn
  1. thread
  2. string
  3. wire
  4. line
  5. (after a number) tier (unofficial ranking of a Chinese city)

classifiers: 條, 股, 根