Are all cargo tank atmospheres at positive pressure with an oxygen content of 8% or less by volume?

所有货舱舱气是否处于正压状态并且含氧量体积比不超过8％？

Are cargo tank relief valves set correctly and actual relief valve settings clearly and visibly displayed?

货舱安全阀的设定位置是否正确，安全阀实际定位的显示是否清楚和直观？