Article 33: the main fixed pipelines connected to equipment shall be marked with the name of material inside the pipe and flow direction.

第三十三条与设备连接的主要固定管道应标明管内物料名称、流向。

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The Metropolitan Police said his breach followed an investigation into whether he was party to the publication of extremist internet material in his name.

BBC: Abu Qatada: Government appeal bid rejected

However, as its name suggests, it runs parallel to the surface of the material that is propagating it, rather than penetrating this material.

ECONOMIST: Solar energy

Muslims should ask themselves if the press would have published similar material that insulted blacks or Jews or other minorities in the name of free speech.

ECONOMIST: Drawing no conclusions