Spark-plug cleaner. A number of spark-plug cleaning devices are in use. They operate on the sandblast principle and send a Blast of gritty ceramic material against the cylinder end of the spark plug placed in the cleaner.

• 火花塞清洁器:火花塞清洁器种类为数不少,都是运用喷砂原理,把砂型的陶瓷材料喷到安放在清洁器中的气缸端部的火花塞上。