steel constructions:

STADCON, s.r.o. - SR 

agriculture:

APLITEC, s.r.o. - SR
KERBL GmbH - DE

Bauer GmbH - AT 

inhall units:

PIATNICA s.r.o. 

LIKOS s.r.o.
VERTI s.r.o.

construction locksmithing:
SSQ, s.r.o. SR 
almon, s.r.o. SR 
ObenAuf Gmbh AT
Strobl GmbH AT 
AluPfeiffer GmbH AT