High-frequency wave one-step forming edge-sealed planar head tying band for breathing mask
High-frequency wave one-step forming edge-sealed planar head tying band for breathing mask
- CN 203,874,247 U
- Filed: 04/14/2014
- Issued: 10/15/2014
- Est. Priority Date: 09/30/2013
- Status: Active Grant
- EN CH
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- Pin
