![To-ensure-the-drum-reaches-its-precise-size,-a-motor-driven-machining-tool-operates-on-the-top-of-each-drum-can](https://videocdn.cdnpk.net/videos/cb373145-8a1c-4dc8-818e-1a50dd3907c5/horizontal/thumbnails/small.jpg)
To ensure the drum reaches its precise size, a motor-driven machining tool operates on the top of each drum can
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