unlimber
/ˌʌnˈlɪmbə(r)/verb
with obj.
1- detach (a gun) from its limber so that it can be used把（炮）从牵引车卸下以便发射。
1.1
- chiefly US unpack or unfasten (something) ready for use〈主美〉使作好使用前准备：
we had to unlimber some of the gear.
我们得把部分装备准备好。