Shinagawa Refra Co., Ltd.
TYK Corporation
IFGL Refractories Ltd.
TRL Krosaki Refractories Ltd.
Beijing LIRR High Temperature Materials Co., Ltd.
Puyang Refractories Group Co., Ltd.
Sinosteel Luonai Materials Technology Co., Ltd.
Sheffield Refractories Limited
Zhejiang Longcheng Naihuo Cailiao Co., Ltd.
Luoyang Yinqiao Naihuo Cailiao Co., Ltd.
China Steel Refractories Co., Ltd.
Chosun Refractories Co., Ltd.
