double nut fastening technique prevent loosen post long structure assembly |
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| navigate by keyword : big bolt bolted coach column concrete connection construction engineering equipment fastener fastening fix fixing flange focus foundation galvanised grass hardware hexagon industry iron joint metallic nature nut pair part pillar pinned pipe pole post power resistance safety screw screws selective set steel strong support technology tool tube |
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| Double nut fastening technique to prevent loosen in post or long structure assembly. Structural detail of the base of the cable car support post. Selective focus |
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