Tube bundle fix the drooped structures through welding for both ends of upper header and make fly ash drop by rapping the end plate of lower header.
锅炉中的管束是上部集箱的两端通过焊接固定垂下的结构，通过锤打下部集箱的端板，振落飞灰。
Jake says thanks. Fell out of his nest over by the plate shop. I'm gonna look after him till he's big enough to fly.
杰克说谢谢你。它从车牌厂房顶的巢中掉了下来，我要照料它长大到能飞为止。
Jake says thanks. Fell out of his nest over by the plate shop. I'm gonna look after him till he's big enough to fly.
杰克说谢谢你。它从车牌厂房顶的巢中掉了下来，我要照料它长大到能飞为止。
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