共 50 条
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- [43] Certification of NDT personnel and accreditation of NDT laboratories in Romania TRENDS IN NDE SCIENCE AND TECHNOLOGY - PROCEEDINGS OF THE 14TH WORLD CONFERENCE ON NDT (14TH WCNDT), VOLS 1-5, 1996, : 1933 - 1936
- [44] OPERATOR CERTIFICATION .2. CERTIFICATION IN THE PACIFIC NORTHWEST SEWAGE AND INDUSTRIAL WASTES, 1959, 31 (05): : 609 - 610
- [45] OPERATOR CERTIFICATION .1. VOLUNTARY CERTIFICATION IN WISCONSIN SEWAGE AND INDUSTRIAL WASTES, 1959, 31 (05): : 607 - 608
- [46] OPERATOR CERTIFICATION IN PENNSYLVANIA JOURNAL AMERICAN WATER WORKS ASSOCIATION, 1982, 74 (09): : 12 - 12
- [49] Certification of NDT personnel in the Republic Belarus TRENDS IN NDE SCIENCE AND TECHNOLOGY - PROCEEDINGS OF THE 14TH WORLD CONFERENCE ON NDT (14TH WCNDT), VOLS 1-5, 1996, : 1911 - 1913
- [50] Certification system for NDT personnel in Slovenia 4TH INTERNATIONAL CONFERENCE OF SLOVENIAN SOCIETY FOR NONDESTRUCTIVE TESTING - APPLICATION OF CONTEMPORARY NONDESTRUCTIVE TESTING IN ENGINEERING, CONFERENCE PROCEEDINGS, 1997, : 285 - 294