GRANabbr.全球救援警报网(=Global Rescue Alarm Network)Granzinn.格兰钦(在德国；东经 11º56' 北纬 53º31')

1. A small amount of light powder of cork dust is sprinkled uniformly along the tube.
   少量的轻粉末或软木屑均匀地撒在管内。