Ngoi Dai Nien Van Dat Brick Company Limited
Thôn Biềng, Xã Nam Dương, Luc Ngan District
Song Cau Ha Bac Joint Stock Company
Đạo Ngạn, Xã Quang Châu, Viet Yen District
Cong Thanh Brick Company Limited
Thôn Lan Hoa, Xã Lan Mẫu, Luc Nam District
Kham Vang Building Materials Company Limited
Thôn Vàng, Xã Khám Lạng, Luc Nam District
Ngoc Viet Brick Production Investment Joint Stock Company
Khu Đầm Vàng, Thôn Vàng, Xã Khám Lạng, Luc Nam District
Cam Ly Brick Joint Stock Company
Lịch Sơn, Xã Cẩm Lý, Luc Nam District
Tan Yen Service Trading Joint Stock Company
thôn Lộc Ninh, Xã Ngọc Châu, Tan Yen District
Hung Thinh Construction and Production Limited Company
Thôn Lộc Ninh, Xã Ngọc Châu, Tan Yen District
Haiha Joint Stock Company
Thôn Liên Sơn, Xã Lão Hộ, Yen Dung District
Song Duong Company Limited
Thôn Nùa Quán, Xã Đào Mỹ, Lang Giang District