[机] 精密工程 precision engineering: 精密工程nanotechnology and precision engineering: 纳米技术与精密工程o machining of precision engineering: 高精度工程加工o precision mechanical engineering: 精确坏工程; 精确机械工程optics and precision engineering: 光学精密工程下载手机词典可随时随地查词查翻译