ZJ300B/2J150B/ZJ70/2SKRoots pump systems with water (oil) ring vacuum pump
ZJP600B/ZJ300B/2SK-6BRoots pump systems with water (oil) ring vacuum pump
ZJ300B/2SK-6BRoots pump systems with water (oil) ring vacuum pump

ZJ150B/2SK-2BRoots pump systems with water (oil) ring vacuum pump

electric control box