首页>
外国专利>
METHOD FOR TESTING LEAKAGE OF WELDING PART OF TANK MADE FROM HIGH QUALITY MATERIAL CAPABLE OF DETECTING LEAKAGE OF WELDING PART BY DETECTING LEAKAGE OF HELIUM GAS
METHOD FOR TESTING LEAKAGE OF WELDING PART OF TANK MADE FROM HIGH QUALITY MATERIAL CAPABLE OF DETECTING LEAKAGE OF WELDING PART BY DETECTING LEAKAGE OF HELIUM GAS
