Except for such features as wrong operation prevention, stem blow-out proof, mounting, pad provided, the metal to metal sealed ball valves made by WILLIAMSON possess the following unique features.

金属硬密封球阀除了具有防止误操作、防止阀杆飞出、设置驱动装置安装平台等结构特点外，还具有如下独特的特点。

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How would I figure it out? What would count as a positive proof?

我怎么能知道呢？什么能算有力的证据呢？

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Proof that five hours out of the house every Saturday is entirely justified.

证明这五个小时的房子每个星期六是完全正当的。

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The signalling work had to be carried out at Proof House junction near Moor Street Station in Birmingham.

BBC: Train delays follow snow in Coventry and Warwickshire

For proof check out the current brouhaha surrounding the divorce between Steven Simkin and Laura Blank.

FORBES: Can You Get a Divorce Do-over?

This chart has often been trotted out as the clinching proof of anthropogenic warming.

ECONOMIST: The debate over global warming is getting rancorous