Слово встречается в следующем контексте:
VIBRO-CENTRIC VALVE SEAT GRINDER
The use of this machine in addition to a valve seat reamer is necessary to completely finish cast iron block hard valve seats and stellite valve seats. This machine is not only applicable to common vehicles, but also applicable to various special vehicles only by providing a pilot stem.
VIBRO-CENTRIC ШЛИФОВАЛЬНЫЙ СТАНОК ДЛЯ ОБРАБОТКИ СЁДЕЛ КЛАПАНОВ

Японский английский.
Заранее спасибо