| 摘要 |
<p>Metal silicate tube with cast-iron jacket.. D7-. And a silicate inner sleeve of equal length. The end face of the inner tube are bevelled inwards at an angle to the end plane of 5-20 degrees. The tubes are centrifugally cast in a mould closed by bevelled plugs of different lengths, to allow for the non-linear contraction of the different materials.</p> |
