1689oops i forgot..
- Jun 7, 2003... i forgot to ask about water proofness of materials.
How is the degree a material is waterproof represented in the US?
here it's sg like:
1000mm up to 10 000mm but i do not know if that means mm/m2 or height of
water from material or whatever, confusing but darn intersting if you ask me...
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