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locking device /ˈlɒkɪŋ dɪvˈaɪs/ n

中文：锁定装置

中文 · 锁定装置Español · seguroFrançais · système de verrouillage
Meaning：Mechanism for locking the flexible hose onto the pipe.
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Found in these illustrated scenes（3）

Ladders and steps Cylinder vacuum Snare trap

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