covering bladecovering knife覆土: earthing铲: shovel; spade覆土层: overbarden; overburden layer覆土环: drag sealer覆土机: backfiller; drag links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:覆土铲,即可在微信中查询翻译