Steel normal temperature blackening treatment liquid metal surface treatment processing screw nut spring blackening agent set

 
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brand:
Huaxin New Materials
model:
Huaxin New Materials
place of origin:
China Mainland
province:
Shandong Province
city:
Liaocheng
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1 kg of blackening liquid 2 5 kg of blackening liquid 5 kg of blackening liquid 10 kg of blackening liquid 25 kg of blackening liquid 1L blackening set degreasing rust blackening antirust 2 5L blackening set
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