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BNC: 27419 COCA: 24511

a substance such as paint or polish that is painted onto a surface to protect it from other liquids going into it, or is put in the space between two materials for the same reason密封剂;防渗漏剂

BNC: 27419 COCA: 24511
BNC: 27419 COCA: 24511
BNC: 27419 COCA: 24511
sealant

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