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| Model No.︰ | SJ |
| Brand Name︰ | SJ |
| Country of Origin︰ | China |
| Unit Price︰ | - |
| Minimum Order︰ | - |
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With the adoption of national standard GB/T17061-1997 large absorption air pipe. Inside and outside the control of the governing standard interface for close air I wear.
Formaldehyde-specific detector
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