示波器说明里所说的gs⼀s是什么意思？gs是什么缩写？

****** SG Singapore
****** SG Senegal
****** SG Secretary-General
****** SG Surgeon
****** SG Solingen
****** SG Shotgun
****** SG Support Group
****** SG Saigon
****** SG Safeguards
****** SG Specific Gravity
****** SG Surgeon General
****** SG Seaborgium (element 106)
****** SG Solicitor General
****** SG Smoke Grenade
****** SG Safety Glass

****** GS Girl Scout
****** GS Graduate Student
****** GS Giant Slalom
****** GS Grand Slam (baseball)
****** GS German Shepherd
****** GS Gold Standard
****** GS Gas Station
****** GS Gauss
****** GS Good Shepherd
****** GS Game Show
****** GS Garden State
****** GS General Support
****** GS General Surgery
****** GS General Staff
****** GS Gaza Strip