Imerys Kaolin, Inc.Georgia, United States
Gansu Road & Bridge Construction Group Co., Ltd.
China Testing & Certification International Group Co., Ltd.Beijing Shi, China
Powerchina Guiyang Engineering Corp. Ltd.
Fermacell GmbHNordrhein-Westfalen, Germany
Shanghai Trendzone Construction Decoration Group Co., Ltd.Shanghai Shi, China
Cirkel GmbH & Co. KGNordrhein-Westfalen, Germany
Tripole Co. Ltd.Tokyo-to, Japan
G. Engineering SrlToscana, Italy
Walker Industries Holdings Ltd.Ontario, Canada
Karl Grumbach GmbH & Co. KGHessen, Germany
Hilgers AG