发明公开
EP0989239A3 Traffic lane marker 审中-公开
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Traffic lane marker
摘要:
A lane marker comprises a housing (2) and a movable element (10) mounted in or on the housing. A fluid (16) is contained within a cavity defined by the housing and movable element. When the temperature is above freezing the movable element extends from the housing and when the temperature falls below freezing the movable element retracts into the housing.
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