nonessential provision非: mistake; wrong; errors基本: basic; fundamental规定: stipulate; provide基本规定: ground rule船用舷梯的基本规定: the general rutes for marine accommodation ladders下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:非基本规定，即可在微信中查询翻译
