Service Contract For The Technical Assistance Of Joint Health And Safety Coordination Of The Works Of The "Construction Project Of Line 9 Of The Barcelona Metro. Conditioning And Installations Of The Plaza De Maragall Station. Code: Tm-00509.31C.3" And Of The "Construction Project Of Line 9 Of The Barcelona Metro. Code: Tm-00509.31C.2". Key: Tm-00509.31C.3+1