基本解释外套管英汉例句双语例句Push straight push rod adjusting inside need, to drive away the outer thimble of the spring;内推需要调节里面推的直杆，来带动顶针将弹簧推开；diannaothj.com词组短语短语Inner and outer thimble bracket 内外顶针架专业释义经济学外套管