ring stack transducer 环形堆放换能器
field ring stack 谷堆
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The ring 2 stack is in use.
第2环堆栈已被占用。
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Lift BOP stack and replace wellhead connector AX ring.
吊起防喷器组并更换连接器AX密封圈。
Black steel case, black stack steel ring, glass lens, brass internal and connection, stainless steel joint.
黑铁壳，黑铁圈，玻璃面，铜机芯，铜管子，不锈钢接头。
The procession moves to the bonfire ground, where revellers form a ring around a stack of wood.
BBC: The Channel Islands�� surviving lore
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