| 摘要 |
PCT No. PCT/US94/14995 Sec. 371 Date Jul. 14, 1995 Sec. 102(e) Date Jul. 14, 1995 PCT Filed Dec. 29, 1994 PCT Pub. No. WO96/21068 PCT Pub. Date Jul. 11, 1996A protected-membrane roof paving system (10) and blocks (12) for use therein. Rectangular ballast blocks (12) are laid in rows. The blocks (12) have channels providing for drainage and equalization of air pressure above and below the blocks (12) under adverse wind conditions.
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