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to knead into
生地に抹茶を練り込んだ。
Matcha was kneaded into the dough.
粘土に錆び顔料を練り込んでいる。
Rust pigment is being kneaded into the clay.
熟練の麺職人は、コシを出すため粉にかん水を練り込む。
An experienced noodle maker kneads lye water into the flour for a firm texture.