The reviews are automatic translation.
On 2017-11-01 10:19:44
How are they used before and after the yellow filter?
During gas fusing operation
On 2017-08-28 09:21:37
I use it on a regular filter.
The melting of the iron material with rust and oil is usually dirty because the color is attached to the smoke.
By doubling this paper filter it will usually prevent contamination of the filter.
Another, 20% price is also cheap and saved.
I bought all three of the pre - filters.
On 2016-11-29 20:34:28
It seems that the other two types are better if welding work is done. As a dust main prefilter.
On 2016-03-29 07:06:00
Because it is cheap and there are so many, it is saved. Because the company does not buy it, I am often asking.
Outdoor welding operation
On 2016-01-30 17:43:14
It is hard to install so it is hard. Dust and dust can be taken well. It is a thankful item.
It is used during the cleaning work in the warehouse.
On 2015-12-31 14:53:12
The powder is always scattered inside the warehouse because of the handling product "powder bag", and it can not be filtered with general mask of nonwoven fabric during cleaning work. Furthermore, using this "prefilter" increases the life of this filter.
On 2015-11-23 07:00:30
I use it everyday. Depending on the work content, it will be necessary to exchange for less than half a day so it is saved with cheap products here. We are satisfied both price and functional aspects.
Work requiring dust protection
On 2015-10-04 19:42:31
Dustproof mask filters clogged up with dusty work and expenditure was expensive at filter fee but by using paper filter the filter became to last longer.
On 2015-06-20 14:03:01
It makes me feel a bit stuffy, but it's easy to use and good price.
Used for welding
On 2014-01-15 14:05:43
A true filter by using this filter? Since life span is extended, it will lead to cost reduction in the long run. Reduce the degree of purchase of replacement filters and reduce labor.