double-post bollard的意思|示意

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双缆桩

双柱带缆桩 ... double-poppet valve 双座提阀 double-post bollard 双柱带缆桩 double-post bollards 双柱缆桩 ...

双柱系缆桩 ... 双座节流阀 double-poppet throttle valve 双柱系缆桩 double-post bollard 双路压力循环式锅炉 double-pressure boiler ...