A utility model patent certificate for machining the spherical surface of a plug valve body-Honors and Qualifications-Yongfeng (Chongqing) New Materials Technology Research Institute Co., Ltd.
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A utility model patent certificate for machining the spherical surface of a plug valve body
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2025-09-09 17:17:58
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A utility model patent certificate for machining the spherical surface of a plug valve body-Honors and Qualifications-Yongfeng (Chongqing) New Materials Technology Research Institute Co., Ltd.