A mounting track system (20) for mounting equipment at various locations along a length of a mounting track (170), the mounting track system (20) comprising a first vertical plurality of securement slots (174), wherein each securement slot (174) comprises an enlarged head portion (180) adjacent a necked-down region (182), such that an enlarged head (114) of a mounting projection (110) of a mounting bracket (44) may pass through the enlarged head portion (180) to allow a stem (112) connected to the enlarged head (114) to slide down the necked-down region (182) such that the enlarged head (114) cannot be removed through the necked-down region (182)； and a second vertical plurality of securement slots (178) in parallel with the first vertical plurality of securement slots (174), where each of the second vertical plurality of securement slots (178) are horizontally aligned with the first vertical plurality of securement slots (174) such that the first vertical plurality of securement slots (174) and the second vertical plurality of securement slots (178) can simultaneously receive a pair of horizontally aligned mounting projections (110) of a mounting bracket (44).차량을 위한 들것 지지 시스템으로서, 이 들것 지지 시스템은 수평 위치에서 들것을 지지하기 위한 지지 아암 조립체를 포함하고, 지지 아암 조립체는 개방 위치 및 폐쇄 위치를 갖는, 지지 아암 조립체의 자유 단부에 있는 조절가능한 후크 조립체를 포함하며, 이 조절가능한 후크 조립체는 개방 위치와 폐쇄 위치사이에서 후크 조립체를 로킹하는 래칫 시스템을 포함한다.
