The framework of the long-stroke pumping unit with compound crown sheave consists of a flat frame with four columns, two cantilever beams and two back legs.
复合天轮式长冲程抽油机主架由四柱扁框架、两个悬臂梁和两个后支腿组成。
A felt cap for a man; shaped like a flat-topped cone with a tassel that hangs from the crown.
一种男式的毡帽；形状像一个平顶的圆锥体，帽顶上垂着一条丝带。
A felt cap for a man; shaped like a flat-topped cone with a tassel that hangs from the crown.
一种男式的毡帽；形状像一个平顶的圆锥体，帽顶上垂着一条丝带。
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