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Donghai Yukang Quartz Material Co., Ltd.
Lianyungang Shenhui Silicon Mstar Technology Co., Ltd.
Qingdao Helm Import and Export Co., Ltd.
Lianyungang Hongkang Quartz Products Co., Ltd.
Jiangyin Entret Coating Technology Co., Ltd.
Lianyungang Jialei International Trade Co., Ltd.
Dengfeng City Ludian Town Xingguang Abrasives Factory