| 摘要 |
With a view to avoiding the coal sticking to the wall of the chute, the latter comprises a first fixed cylindrical section 1 connected to the wall 3 of the combustion chamber, a second coaxial section 2 which is capable of turning inside the preceding one, into which it penetrates over part of its length, an external annular rim 5 of said second section, and an annular support 6 integral with said first section constituting a support for said rim. <IMAGE>
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