Fan-Type Control – A thermal control designed such that the contacts close on temperature rise. Also referred to as “close on rise,” or “normally open.” Limit-Type Control – A thermal control designed such that the contacts open on temperature rise. Also referred to as “open on rise,” or “normally closed.” Disc Cup – A cup that holds a disc in place on a disc-type control. Bumper – An actuating pin that transmits motion from the sensing mechanism to an actuating arm. Castellation – Posts affixed to a thermostat switchcase that serve to align a mounting bracket. 最后2句是与继电器相关的术语,我实在是不懂什么意思,谢谢你们谁来帮我一下吧.