中空玻璃 zhōng kōng bō li

DEFINITIONS

  1. double glazing

CHARACTERS

中 zhōng
HSK 1
central; center, middle; in the midst of; hit (target); attain
空 kōng
HSK 3
empty, hollow, bare, deserted
玻 bō
HSK 5
glass
璃 li
HSK 5
glass