pipeclay
管土
Pipe·clay, v. t.
1. To whiten or clean with pipe clay, as a soldier's accouterments.
2. To clear off; as, to pipeclay accounts. [Slang, Eng.]
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pipe-clay
v : whiten or clean with pipe-clay; "pipe-clay leather"
pipeclay
n : fine white clay used in making tobacco pipes and pottery and
in whitening leather [syn: terra alba]