Officina Tuborum Ferreorum
Tangshan Zhengyuan Societas Industriae Fistularum, Ltd.
Tangshan Youfa Societas Fabricationis Tuborum Ferreorum, Ltd.
Tangshan Youfa Nova Societas Instrumentorum Aedificandorum, Ltd.
Capacitas Productionis
Lineae Productionis Tuborum Rotundorum 39 Erw
XXIV Lineae Productionis Tuborum Rotundorum Galvanizatorum Erw
Quattuor Lineae Productionis Compositorum Chalybis Plastici
9 Lineae Productionis pro Impalcationibus Ringlock, normae/librae/diagonales, pro fulcris