单词	进风管
释义	同进汽管--进风道--进水管
随便看	directivity function directivity gain directivity index directivity index{ =di} directivity index of a sound source directivity of directivity of antenna directivity pattern directivity pattern diagram directivity reflectance directivty direct join direct jump direct keying device direct kick direct knead direct knead-- straight dough (method) direct knead， straight dough direct knead， straight dough (method) direct knowledge direct labor direct labor budget direct labor cost direct labor cost method direct labor costs