युरोपियन स्ट्यान्डर्ड अनुसार वेल्डिङ सम्बन्धी सीपमूलक तालिम कसरी सिक्न सकिन्छ र सिपमूलक तालिम सिकेर कसरी काम गर्ने पर्दछ?According to the European standard, how to learn welding skill training and how to work after learning the skill training.
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