Good control of foam line ensures the inherent quality of glass marbles.

控制好泡界线即可保证玻璃球内在质量。

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The cost of raw materials for C-glass marbles, including their transport cost, is rising continually, leading to the continual increase of production cost.

中碱玻璃球原料的成本包括原料的运输成本持续上扬，使生产成本日益增高。

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This paper describes how to produce C-glass marbles using unrefined coke-oven gas and gives proofs of the feasibility and advantage of passing air through the to gas regenerator in practice.

本文介绍了利用未经精制的焦炉煤气生产中碱玻璃球的情况，并用实践证明了煤气蓄热室走空气的操作方法的可行性和益处。

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The game is played with 49 glass or ceramic marbles grouped together on a 2m-diameter concrete cylinder raised 7cm off the ground and covered in sand.

BBC: Knuckle down at England��s World Marble Championships

In Devon, the House of Marbles is a traditional working games and glass factory, which stocks approximately 25 million marbles.

BBC: Britain��s most bizarre attractions

The exhibition, entitled Marbles United, includes a computer simulated walk through the museum, showing the reunited marbles displayed in glass cases.

BBC: Science reunites Elgin Marbles