Assertion: present brattice | /r/HasProperty | formed of porous material
Facets:
Source sentences:
text: It has been noted above that the present brattice may be formed of a porous material and that some leakage will occur about the edges of the spring periphery, but a coated, non-porous fabric material and the use of a sealant with or without the peripheral extensions will form an essentially leakproof emergency closure which may be rapidly installed in an emergency, as needed.
text: It has been noted above that the present brattice may be formed of a porous material and that some leakage will occur about the edges of the spring periphery, but a coated, non-porous fabric material and the use of a sealant with or without the peripheral extensions will form an essentially leakproof emergency closure which may be rapidly installed in an emergency, as needed.