Plug gauge 塞规 ; [机] 圆柱塞规 ; 插规

Plug gap gauge 火花塞间隙量规

SPARK PLUG GAUGE 火花塞塞尺 ; 火花塞厚薄规

taper plug gauge 锥体塞规

cylindrical plug gauge 柱形塞规

hand plug gauge 手塞规

double-end plug gauge 双端塞规

end plug gauge 双端塞规

limit plug gauge 极限塞规 ; 界限塞规