pit ptotection gred底: bottom; base坑: hole; pit; hollow护栏: guardrail; guard bar; rail底坑: pit护栏: guardrail; guard bar ; rail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:底坑护栏，即可在微信中查询翻译
