欧姆龙微动开关 21A（OF:1.23N(125gf)) SPDT SPST-NC SPST-NO 微动开关 D3V-21G-1□4A-△ D3V-21G-2□4A-△ D3V-21G-3□4A-△ D3V-21G1-1□4A-△ D3V-21G1-2□4A-△ D3V-21G1-3□4A-△ D3V-21G1M-1□4A-△ D3V-21G1M-2□4A-△ D3V-21G1M-3□4A-△ D3V-21G2-1□4A-△ D3V-21G2-2□4A-△ D3V-21G2-3□4A-△ D3V-21G2M-1□4A-△ D3V-21G2M-2□4A-△ D3V-21G2M-3□4A-△ D3V-21G3-1□4A-△ D3V-21G3-2□4A-△ D3V-21G3-3□4A-△ D3V-21G3M-1□4A-△ D3V-21G3M-2□4A-△ D3V-21G3M-3□4A-△ D3V-21G4-1□4A-△ D3V-21G4-2□4A-△ D3V-21G4-3□4A-△ D3V-21G4M-1□4A-△ D3V-21G4M-2□4A-△ D3V-21G4M-3□4A-△ D3V-21G5-1□4A-△ D3V-21G5-2□4A-△ D3V-21G5-3□4A-△ D3V-21G5M-1□4A-△ D3V-21G5M-2□4A-△ D3V-21G5M-3□4A-△ D3V-21G6-1□4A-△ D3V-21G6-2□4A-△ D3V-21G6-3□4A-△ D3V-21G6M-1□4A-△ D3V-21G6M-2□4A-△ D3V-21G6M-3□4A-△