短語詞組短語proving -ground facilities 試驗場設(shè)施Proving -ground network 試驗場網(wǎng)絡(luò)milford proving ground 試驗場;米爾佛德試車場White Sand Proving Ground 白沙試驗場proving ground test 實車試驗場試驗air proving ground command 空軍試驗場管理部Lommel Proving Ground 基地the Dahlgreen Proving Ground 于達爾格林試驗場 返回 proving ground