Packaging polyurethane, which is a very low-grade inexpensive material, there is no fire rating in the world for that.

More skillful contractors may have higher overhead and better standards of workmanship than the lowest bidder, who may be using low-grade materials.

If passed, the measure would bar all higher level radioactive materials from the state and raise taxes fourfold on revenues generated by low-grade material.

Although there have been a significant number of reported thefts of low-grade material, authorities do not yet know of any cases involving weapons-grade materials.

He was working with a low-grade material, but one which contained an element which natures more elevated lack - the incalculable.

The document reveals that Borchardt claimed the bust was made of gypsum (a very low-grade material) to mislead the inspector.

For over four decades, Barlow has created anti-monumental sculptures from inexpensive, low-grade materials such as cardboard, fabric, plywood, polystyrene, scrim and cement.

They were purifying and concentrating low-grade radioactive materials to be sold to U.s. companies, which use them for medical purposes.

The resulting low-grade material might afford a cheap way to coat large objects like airplane windshields with scratch-proof surfaces.

A modern mine is a high-tech, engineered, computerized marvel that produces new primary wealth from low-grade material our pioneer forebears could not touch.