custom clearance permit 结关通行证
customs clearance permit 结关通行证 ; 海关允许放行 ; 结关证
port clearance permit 离港许可证
special clearance permit 特别出港许可证
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Ribs well sprung from the spine, but flattened in lower end to permit elbow clearance.
肋骨自脊椎处隆起，向下逐渐变平，到肘部为止。
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