MRC:
The environmental elements or conditions that an item is designed or protected to resist or withstand satisfactorily.ADZC
Environmental Protection:
Abrasion resistant and accelerated light and acid resistant and heat and salt spray resistant and weather resistant
MRC:
The lettering or design on the item,or that is the item.AYBM
Inscription:
1st inscription: serial no. ---, standard &020 &040 &060 ---, ---, bore ---, ---, ---, ---, ---, ---; 2nd inscription: reconditioned, at ---, date ---; 3rd inscription: standard -010 -020 -030 -040 ---, mains ---, ---, ---, ---, ---, ---, rods ---, ---, ---, 1st side