If valve clearance needs to be adjusted, loosen the locknut on rocker arm adjusting screw.Turn adjusting screw until feeler gauge slips with a slight drag.是什么意思_If valve clearance needs to be adjusted, loosen the locknut on rocker arm adjusting screw.Turn adjusting screw until feeler gauge slips with a slight drag.在線翻譯_英語_讀音_用法_例句