第一鉛鋅鑛張恒國小組,在四月份創出了快速送道月進129米的新紀錄。他們的經驗是值得各鑛學習的。爲了進一步提高現有的生産技術水平,要求各鑛大力推廣已經取得成績的先進經驗,在快速送道工作上爲突破150米、爭取200米而奮斗。——編者—— Zhang Hengguo, the lead-zinc mine, set a new record of 129 meters per month for fast track delivery in April. Their experience is worth learning from each mine. In order to further improve the current production technology level, all mines are required to vigorously promote the advanced experience that has been achieved and to strive for a breakthrough of 150 meters and a gain of 200 meters in the fast lane work. --editor--