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VAN HIEN MINERAL CO., LTD Address: 2/1 Street 24, P Hiệp Bình Chánh, Thủ Đức District, HCM Van Hien Co., Ltd. will advise you on the order of buying and selling indo coal lumps, negotiating where to import coal and how to deliver it. In particular, guide you the method and how to identify which lumps of coal are of the right quality with enough heat and without wasting mass in kiln operation.