gravel foundation砾石: gravel; grail; dirt碾压: roller compaction; grinding基础: foundation; base; basis石碾: kollergang砾石基础: gravel foundation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:砾石碾压基础,即可在微信中查询翻译