picketted

1. 1.

   past participle of picket；n. a detachment of troops guarding an army from surprise attack；n. a protester posted by a labor organization outside a place of work；n. a vehicle performing sentinel duty；n. a wooden strip forming part of a fence

   (picket 的过去分词) n. 桩；尖桩；围住；警戒

警戒；派...担任纠察；担任纠察