Telescopic props (general means for fixing telescopic parts together )

Full Title

Props (in the building art E04G25/00); Chocks > Telescopic props (general means for fixing telescopic parts together )

Child Classifications

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• E21D 15/15 Means counteracting entry of dirt; Built-in cleaning devices
• E21D 15/16 with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
• E21D 15/28 with parts held relatively to each other by friction or gripping
• E21D 15/44 Hydraulic, pneumatic, or hydraulic-pneumatic props
• E21D 15/46 with load-measuring devices; with alarm devices