Tongkah Harbour Public Company Limited is a Thailand-based company engaged in mining operations. Its principal activities include tin mining, gold mining, igneous rock quarrying, and building rental and service residences. The Company's subsidiaries comprise Tungkum Limited engaged in gold mining business; Cholsin Limited engaged in crushing andesite business, Sky Cliff Limited (Sky Cliff) engaged in building rental and service residences, and Sea Minerals Limited (Sea Minerals) engaged in tin mining business.
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