Loaʻa i kahi ʻano pōlele V-Port kahi noho 'v' a i ʻole he pōpō ʻano 'v'.ʻO kēia ka mea e hiki ai i ka puka ke wehe a pani ʻia i kahi ʻano ʻoi aku ka hoʻomalu ʻia, me kahi kokoke i ke ʻano kahe laina.ʻO kēia ʻano valve ka mea i ʻike ʻia he valve control no ka mea e pono e hoʻokele ʻia nā velocities kahe ma muli o ka noi.