| 31. | Microspheres can be manufactured from various natural and synthetic materials.
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| 32. | Cavity-nesting red-shafted flickers, who like synthetic materials, pecked through the fake sandstone to roost.
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| 33. | Anything made of plastic or other synthetic material melts away.
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| 34. | Not until this century did inventors began to make plastics completely from synthetic materials.
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| 35. | The ball is a sphere of light material, covered with leather or synthetic material.
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| 36. | These seals are mostly manufactured from rubber or other flexible but durable synthetic materials.
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| 37. | There are many advantages to using the synthetic material as a vehicle for delivery.
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| 38. | Olation and oxolation are responsible for the formation of many natural and synthetic materials.
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| 39. | It is somewhat large for a pistol and is constructed mainly from synthetic materials.
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| 40. | The synthetic materials allow economic, predictable manufacture for consistent performance.
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