protective turnout防护: protect; shelter; shield; gu ...道岔: railroad switch; slip point; ...列车防护道岔: train protection switch无防护道口: nonguarded crossing道岔防护: switch protection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:防护道岔，即可在微信中查询翻译
