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Parts made from the same batch — some rust, some don't — is the material mixed?|Foshan Huili Metal Technology Co., Ltd.(佛山市惠利金属科技有限公司)
Same-batch variance first suspect mix or uneven finish; per-piece PMI to locate, then trace heat.
This conclusion is compiled from our technical article: Company & brand (同批锈蚀差异判别经验). Verify against your actual duty; call us to discuss.
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Same-batch variance first suspect mix or uneven finish; per-piece PMI to locate, then trace heat.
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