Tennis trainer for practising serves - has channel with conical bores and acoustic signal to indicate correct shot
DE3939215A1
Reduction of noise of railway traffic - involves two=part longitudinal element of polyurethane and lead fixed to the sides of the rails
DE3722439A1
Device for reducing sound energy on a wheel/rail vehicle system
DE3631492A1
Reduction of the structure-borne noise on the rails of a railway track
DE3605831A1
Device for reducing the vibrational emissions in railborne transportation systems
DE3504856A1
Device for keeping clean rectangular reflectors on road reflector posts
DE3501500A1
Device for keeping reflectors on road reflector posts clean
DE3409645A1
Device for cleaning reflectors on road reflector posts
DE3405143A1
Device for cleaning reflectors on reflector supports
DE2900481A1
Incorrect one way street approach warning barrier - comprises stepped transverse road surface protuberance with one steep face
DE2854130A1
OVERHEAD DIRECTION WITH VIBRATION SIGNS
DE2518795A1
Vehicle wind operated wiper for roadside guide post reflectors - is fitted with flap which extends through gap in to hollow interior and has end depression
DE2507060A1
Mud-protected rotatable roadside guide post - with wind apron on upper part seated on tube stump on connector
DE2454713A1
Reflector box for hollow street lighting posts - has pivoting flap to allow passage of wind pressure waves coused by motion of traffic
DE2431906A1
Swing shield for road signs - overlapping sheet steel surfaces have bends so that wind sway is in one direction
DE2340268A1
Road sign which swings to relieve wind pressure - has area of large sign divided up into shutters which open when wind pressure is high
