4 for a fire door core board .

用于防火门芯板。

youdao

Housrey special type fire door core board (perlite) Mainly applied to wooden fire door, steel fire door in the fire fill material;

防火门专用豪仕莱特芯板（珍珠岩）主要适用于木质防火门、钢质防火门的防火填充材料；

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The quality and performances of non-woven fabric and plastic core board place an important role in speeding up the consolidation of soft soil foundation.

无纺布滤膜和塑料芯板的质量与性能，对排水板在软基加固工程中能否发挥其加速软土固结排水的功能至关重要。

youdao

Be that as it may, Waterloo's confidence in its long-running leaders seems stronger than ever before, because co-CEOs Jim Balsillie and Mike Lazaridis have just been made co-chairmen of the board... presumably just so they can crack jokes about running "dual-core" board meetings.

ENGADGET: RIM beats earnings estimates, falls just shy on subscriber growth; co-CEOs now co-chairmen, too

They don't believe it, they just say it because they want to keep the older core vote on board.

BBC: Sing if you're glad to be Tory

Last September, the New York brokerage Cantor Fitzgerald teamed up with the New York Cotton Exchange to develop an electronic exchange to trade American government-bond futures, striking at the core of the Board of Trade's franchise.

ECONOMIST: Chicago��s ancient futures exchanges are showing their age