英语词汇“principal normal section”的读音、翻译、释义、用法及例句-智慧网

词汇	principal normal section
释义	principal normal sectionprincipal normal section1.■主正截面
随便看	hook pole hook rate hook rebate hook release circuit hook scale hook scissors hook scraper hook screw hook-shaped structure hookshop Hook's law hook spanner Hook's spring hook station hook stud hook switch hook tender hook teuder hook theory hook thimble hook throw hook tool hook tooth hook-tooth file hook-tooth sprocket gear

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