TY JOUR TI Mercury Discharge Lamps by Harold Arnold and Their Application KW New York – San Francisco telephone line KW telephone relay KW repeater KW mercury discharge lamps KW Peter Cooper Hewitt KW Harold Arnold mercury discharge lamps JO Infocommunications and Radio Technologies AU Pestrikov, V.M. PY 2023 IS 6 PB Federal State Educational Institution of Higher Education Sevastopol State University