युरोपियन स्ट्यान्डर्ड अनुसार वेल्डिङ सम्बन्धी सीपमूलक तालिम सिकेर जाँदा के के फाइदाहरु हुन्छन्!
According to the European standard, what are the benefits of learning welding skills training?
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