短語詞組短語coal column machine head 煤棒機(jī)機(jī)頭column n head 柱頭;柱帽column cap head 柱頭flared column head [建]漏斗式柱頭column head pressure 柱頭壓flared d column head 漏斗式柱頭expanded column head 擴(kuò)頭柱column head sampling 柱頭進(jìn)樣water column head 水柱高度 返回 column head