waterproof maintenance
防水维修
以上为机器翻译结果，长、整句建议使用 人工翻译 。
His maintenance-free bike uses a "secret" mix of organic materials to make it waterproof and fireproof, and is then lacquered to give it a friendlier appearance.
ENGADGET: Cardboard bicycle 'close to mass production': tough, green and just $20
应用推荐
模块上移
模块下移
不移动