Contract Notice - General Guideline, Standard Rules Negotiated Procedure With Prior Publication Of A Call For Competition/Negotiated Procedure (Services) Avoe, Expansion Of The Aeration Sewage Treatment Plant Ober-Erlenbach - Engineering Services Lph 1-9 Engineering Services Lph 1-9 For The Expansion Of The Aeration At The Ober-Erlenbach Sewage Treatment Plant Avoe, Extension... More