frontal advance displacement method前缘: lip; snoot; leading edge推进: push on; carry forward; adva ...驱: drive替: replace; substitute for; sup ...法: law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:前缘推进驱替法，即可在微信中查询翻译
