double PID双PIDdoubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double body bearing boat双体承压舟double-helix structure二重螺旋结构double-sided polishing双面抛光double acting compressor双动压缩机,双作用压缩机,双动式压缩机double diameter cylinder双径气缸double-walled bell jar双层烧结钟罩double impression method锤击布氏硬度测定法Double layer interaction双电层相互作用double-dense recording双密度记录Double idle state method双怠速法