I have mixed thoughts on the D-ring which Maxpedition has been using for a while.
我一直对马盖先使用的这个D环设计有更多的想法。
2
Moreover, parent compound 2.11 was designed by changing hybridization of carbon which attached with the pyranone D-ring at 7-position.
再次，通过改变与吡喃酮环相连的亚甲基碳原子的电子云杂化状态，设计了化合物类型2.11。
3
If the pilot had to pull the "d" ring (ejection handle) in an emergency, the cables would snap the wearer's feet back under the seat to ensure a smooth and safe ejection from the aircraft.