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Sentence analysis
8Spans
Sentence
Span Details
逆流
backward flow; backflow; reflux; regurgitationnoun, suru verb
を
object markergrammar
防ぐ
defend against; protect against; prevent; avert; avoidgodan verb
ために
for; for the sake of; on behalf of; because of; due to; as a result of-> 為にconjunction
チェックバルブ
check valvenoun
が
subject markergrammar
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
です。
be; is; arecopula, auxiliary
出洲ですspit of land; sandspit