phòng tuyến

== Vietnamese == === Etymology === Sino-Vietnamese word from 防線. === Pronunciation === (Hà Nội) IPA(key): [fawŋ͡m˨˩ twiən˧˦] (Huế) IPA(key): [fawŋ͡m˦˩ twiəŋ˦˧˥] ~ [fɔŋ˦˩ twiəŋ˦˧˥] (Saigon) IPA(key): [fawŋ͡m˨˩ t⁽ʷ⁾iəŋ˦˥] === Noun === phòng tuyến (military) defense line; fortification line