240-metre level adit, Ma On Shan mine 馬鞍山礦場240米新礦洞口

馬鞍山礦坡240米處的礦坑入口,遭連場暴雨及山泥傾瀉掩埋後,公司於1957年為該礦坑開鑿新的三合土坑道。A new concrete tunnel is constructed at 240-metre level in 1957 at Ma On Shan mine slope after a heavy rainfall and landslide that covers up the original 240-metre level adit.

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