A simpler single door was substituted for twin doors on the front landing gear bay 一个更小的单开门取代了前起落舱原来的双开门。
Modified expansive laminoplasty for the treatment of cervical spondylotic myelopathy 双开门椎板成形椎管扩大术治疗多节段脊髓型颈椎病评价
A case of doubled - opening the door for canaloplasty in the treatment of recurrent cervical spondylotic myelopathy 双开门椎管成形术治疗复发性脊髓型颈椎病1例
Use it as a double - wall tent for full protection or as a freestanding tarp shelter with optional footprint to save weight 双开门,两个防湿开门还有两个大门厅用来放置装备准备食物。