commiss direct novemb adapt technic progress council direct eec approxim law member state relat field vision windscreen wiper wheel agricultur forestri tractor eec commiss european commun regard treati establish european econom commun regard council direct eec march approxim law member state relat type approv wheel agricultur forestri tractor amend direct eec articl thereof regard council direct eec june approxim law member state relat field vision windscreen wiper wheel agricultur forestri tractor regard council direct eec june approxim law member state relat roll protect structur wheel agricultur forestri tractor view experi gain provis adopt roll protect structur affect configur part tractor superstructur great import field vision adapt technic progress provis relat field vision traffic safeti requir respect wheel agricultur forestri tractor stringent measur provid direct accord opinion committe adapt technic progress direct remov technic barrier trade agricultur forestri tractor adopt direct articl direct eec amend word quot field vision quot delet articl articl articl insert quot articl effect member state ground relat field vision tractor refus respect type tractor grant eec type approv issu document refer indent articl direct eec grant nation type approv prohibit entri servic tractor field vision type tractor tractor compli provis direct effect octob member state longer issu document refer indent articl direct eec respect type tractor field vision compli provis direct oj oj oj oj refus grant nation type approv respect type tractor field vision compli provis direct effect januari member state prohibit entri servic tractor field vision compli provis direct quot annex amend accord annex direct articl member state bring forc provis requir order compli direct april forthwith inform commiss thereof articl direct address member state brussel novemb commiss étienn davignon member commiss annex read mask effect quot mask effect quot mean chord sector semi circl vision ow structur compon roof pillar air intak exhaust stack frame windscreen read tractor horizont surfac shown figur horizont support level refer point mount point sourc light mm symmetr locat respect refer point support rotat centr point vertic axi pass refer point purpos measur mask effect support align line join light sourc perpendicular line join mask compon refer point silhouett deepest shadow overlap project semi circl vision mask compon light sourc switch simultan altern measur accord figur read mask effect exce mm read mask effect due adjac structur compon mm width configur interv mm measur chord semi circl vision centr mask effect read sector vision mask effect exceed mm exceed mm permiss compon caus redesign reloc side total mask effect exceed mm exceed mm mask effect exceed mm read follow altern procedur set accept individu mask effect determin mathemat requir appli respect size distribut number mask effect read purpos determin mask effect sector vision mask effect due frame windscreen obstacl accord provis consid singl effect provid distanc outermost point mask effect exce mm figur draw replac draw gt pic file quot quot gt