短语词组短语swirl back -plate 复合旋水片back -up plate 垫板;背面填充的电铸版NEW TYPE BACK -UP PLATE 新型垫片rivet -back plate 铆钉垫圈rectangular air -back plate 气背固支方板plate back -up frame 垫板架explosive pull -off back plate 爆脱背板 返回 back-plate