r13.14 noise difference contours do minimum scenario to do something scenario for opening year with mitigation, file type: PDF, file size: 5 MB
r13.14 cyfuchliniau gwahaniaeth sŵn senario gwneud lleiafswm i senario wneud rhywbeth ar gyfer flwyddyn agoriadol gyda lliniaru, math o ffeil: PDF, maint ffeil: 5 MB