短語詞組短語Backing Storage Device 儲存設(shè)備backing off device 後退裝置backing up device 備份設(shè)備floating head backing device 浮頭鉤圈;浮頭勾圈;繙譯backing device info 使用爲(wèi)每個塊設(shè)備S -floating head with backing device 鉤圈式浮頭 返回 backing device