Phu Kim An Mechanical and Construction Joint Stock Company
Khu 3, Xã Phú Nham, Phu Ninh District
Vinh Thinh- Phu Tho Building Materials Joint Stock Company
Khu 5, Xã Thượng Nông, Tam Nong District
Song Da Brick and Tile Join Stock Company
Khu 8, Xã Yến Mao, Thanh Thuy District