EN ISO 287-1 Qualification Test of Welders-Fusion Welding-Part 1: steels.

EN ISO 287 - 1焊工资质测试—熔焊—第一部分：钢材。

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However, it's very demanding on the skill of welders with poor working condition and low efficiency.

但对焊工的操作技术要求高；劳动条件差，生产率低。

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Make available qualification tests of welders and qualification records of the NDE personnel to the Engineer upon request.

对焊工进行有效的资质测试，并且满足NDE对工程师个人要求的技术合格证书。

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So are beer prices, but the bars in Port of Spain are crammed with immigrant labourers welders from St Vincent, Jamaican architects and French engineers.

ECONOMIST: A gas boom and a dash for development

So specialised, in fact, that Bob Richwine, the head welding teacher at the college, said he had never heard of them, and so difficult that only experienced welders could attempt them.

ECONOMIST: Industrial job creation is a grind

Many of the region's industrial and building firms complain that it is hard to find competent welders.

ECONOMIST: Helping the poor