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boom cylinder /ˈbuːm ˈsɪlɪndə/ n

中文：动臂油缸

中文 · 动臂油缸Español · cilindro del elevadorFrançais · vérin de la flèche
Meaning：Hydraulic device consisting of a telescopic arm that controls the movement of the boom.
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Found in these illustrated scenes（2）

Hydraulic excavator Wheel loader

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