محمل كروي خاص أحادي أو متعدد الصفوف، صلب أو ذاتي المحاذاة، ومصنوع من ساق صلبة أو مجوفة، ملولبة داخليًا أو خارجيًا.
material controlled iaw ss800-ag-man-010/p-9290 system certification produres and criteria manual for deep submergence systems; critical item for safety and survival of deep submergence research and rescue vehicles as differentiated by special test features reference number differentiating characteristics, quality assurance tested and certified for deep submergence systems special features, bearing rod end lh part name assigned by controlling agency, zzzy criticality code justification