 Arụ ọrụ ụkpụrụ: Low ọcha nitrogen na hydrogen nime igwekota wee abatakwa ruru, deaerator, ala dị ọcha nitrogen na oxygen na chemical mmeghachi omume nke mmiri na hydrogen na deoxidation mkpali nokpuru edinam nke chemical usoro: 2H2 O2, 2H2O Q , omimi nke mmapụta oxygen wepụrụ; mgbe jụrụ mmiri, na mgbe ahụ nime draya mgbe elu ájá miri emi akpịrị ịkpọ nkụ na-adị ọcha nke nitrogen. 