single footing的相关资料：
临近单词
single mode
single
Single Screen Entry of Confirmations
single-disc electromagnetic clutch
single-flow centrifugal compressor
single-layer elliptic rotary shell
single-phase aircooled transformer
single-canvas front mounted binder
single sideband frequency modulation
single-welded butt joint with back
single fixed-field isodose pattern
single closed magnetic circuit relay
