floor mat, for road motor vehicles (excl. mats of textile material or of unhardened vulcanized rubber)
disc ,of unhardened gelatin, for sticking billiard-cue tips
Capsule of unhardened gelatin[for lighter fuels or pharmaceuticals]
cock,fluid-flow control (excl. of unhardened vulcanized rubber , ceramics or glass)
Such a staircase, with its accessories, in the older and more crowded parts of Paris, would be bad enough now; but, at that time, it was vile indeed to unaccustomed and unhardened senses.
Polymers may be incorporated in concrete in two ways: either added to the unhardened concrete slurry or impregnated into the void structure of the hardened concrete.
