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一种具有选择性的HW—LD型井下线路检漏继电器最近在河北省邯郸市无线电一厂定型投产。这种新型井下线路检漏继电器,是专为解决传统线路检漏继电器不带有选择性
A Selective HW-LD Downhole Line Leakage Relays Recently put into operation at Radio I Factory of Handan City, Hebei Province. This new underground line leak detection relay, is designed to solve the traditional circuit leakage detection relay without selectivity