m - HKU Libraries
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m - HKU Libraries
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(d) The bad effects on drafting (d)<br />
when using different diameters<br />
of top roller cots on<br />
the arbor.<br />
(e) The reasons for varnishing (JIR °<br />
(g) The dangerous parts and (g)<br />
safety devices on the roller |gg<br />
grinding machine.<br />
no