Resting Heart Rate. Your RHR is the number of beats your heart makes per minute while you are at rest. You can determine your RHR by taking your pulse before you get out of bed in the morning.

Resting Heart Rate. Your pulse at rest. It is best to measure this first thing in the morning before getting out of bed, although you can measure your RHR after having been at rest for at least 10 minutes.

Resting Heart Rate. is the amount of times your heart beats per minute while you are at rest. For most accurate results, the RHR should be taken in the morning before getting out of bed.

Residual Heat Removal. is the removal of the residual heat generated in the reactor fuel after reactor shutdown to prevent the fuel overheating and possibly melting.  The heat removal is performed by a set of pumps, piping, valves and heat exchange equipment circulating water by the fuel while the reactor is shut down.

rear head restraint (3xrhr = three rear head restraints)

abb. (right hand reverse bevel)

red hard rubber.