单向压缩

unidirectional

unidirectional scavenging cylinder scavenging

unidirectional

unidirectional pressure temporary plugging additive

one-way circuit【电子】;unidirectional circuit【电子】;unilateral circuit【电子】

unidirectional magnetization【电磁】

unidirectional membrance rupture valve

unidirectional transducer【电子】;unilateral transducer【电子】