[建]?桩盔
... 桩尖阻力 end-resistance 桩盔 pile helmet 桩帽 cap ...
桩帽
If the yet-to-be drawn up proposal were adopted, the new rule would be expanded to cover running backs or receivers dipping their heads and using the top of the helmet to drive the pile backward.
WSJ: NFL looking to focus on replay issues, safety
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