restricting collar
... restricted opening 有限的开孔 restricting collar 限制箍 resurgent gas 放出煤气 ...
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采用这种双钢丝夹箍，不仅可降低维修成本，而且适用范围不受限制。
Adopting the dual steel wires hoop can not only reduce the maintenance cost, but also does not limit the application range;
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