pitman head的用法和樣例：
例句
- Looms that use rigid rapiers eliminate entirely the need to assist the rapier head through the warp shed.
織機在使用剛性劍桿時完全沒有必要引導劍桿頭穿越梭口。 - The taper stem head then transfers a vertical closing force to a lateral force which positively seats the knife against the seat face.
然後錐形閥桿頭將垂直關閉力轉換成側向力，將閘刀放置到閥座表面上。
