An appropriate amount of high-grade grease ( bearing 130℃ and being waterproof ) is prepacked in the bearings.
轴承已注入适量的高级润滑脂 ( 能承受130℃的高温并具有防水性能 ).
Sheldon: It's my prepacked disaster evacuation bag. It's recommended by the Department of Homeland Security. And Sarah Connor.
这是我事先准备的紧急疏散包,是国土安全部推荐过的,还有Sarah Connor(终结者女主角)。
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