           Ҫ
1.ԲֱΪ0.6mm׼ҳΪ0.6mm׼ҳΪ1mm.
2.ܷ治пơˡݺƵȱݡ
3.ӹδעߴ繫GB/T1804һ㹫δעԺͽǶȳߴĹеmȡ
