on-board fire是什么意思

用法例句

Two kinds of solid film lubricant was studied to meet the requirements of spacecraft mechanism,One named BJ using in outside spacecraft and the other named GYM-8 using in inside.

针对空间飞行器对固体膜润滑剂的需求,研制了两种飞船机构上应用的固体膜润滑剂,分为舱外机构使用的B J干膜润滑剂和舱内机构使用的GYM-8干膜润滑剂两类。