The tact switch is suitable for high-density surface mounting, some can be cleaned after welding, the sealed type dustproof tact switch is suitable for high-density surface mounting, some can be cleaned after welding, and the sealed type dustproof tact switch is suitable for high density. Surface mount, some can be cleaned after soldering, sealed type dustproof tact switch suitable for high density surface mount, some can be cleaned after soldering, sealed type can be dustproof