开关按钮, 蘑菇头, 按钮开关
Round 40 mm cap fits TW series operators.
e络盟: 开关按钮, 蘑菇头, 按钮开关
Allied Electronics: Switch part; 40mm mushroom cap; Fits TW series; Black
Verical: Switch Access Round Mushroom Button Push Button Switch
IDEC