steel sleeper钢: sharpen; strop; whet枕木: crosstie; sleeper; tie钢枕: steel sleeper枕木: [交通运输] crosstie; sleeper; tie钢枕孔型: sleeper pass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:钢枕木，即可在微信中查询翻译
