Bethe-hole coupler 倍兹孔耦合器

two-hole coupler 双孔耦合器

side-hole coupler 洞耦合器

two hole coupler 双孔耦合器

single-hole directional coupler 单孔定向耦合器

Hole-type directional coupler 孔型定向耦合器

Bethe-hole directional coupler 倍兹孔定向耦合器

two-hole directional coupler 双孔定向耦合器

hole directional coupler 单孔定向耦合器

coupler knuckle pin hole 钩耳孔