JPH01163449U - - Google Patents

Info

Publication number

JPH01163449U

JPH01163449U JP5561788U JP5561788U JPH01163449U JP H01163449 U JPH01163449 U JP H01163449U JP 5561788 U JP5561788 U JP 5561788U JP 5561788 U JP5561788 U JP 5561788U JP H01163449 U JPH01163449 U JP H01163449U

Authority

JP

Japan

Prior art keywords

filter

filters

layers

upstream side

registration request

Prior art date

1988-04-25

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 239000002184 metal Substances 0.000 claims 1
• 238000000746 purification Methods 0.000 claims 1
• 238000011144 upstream manufacturing Methods 0.000 claims 1
• 239000000428 dust Substances 0.000 description 1
• 238000009423 ventilation Methods 0.000 description 1