Because warm air can hold more moisture than cool air, the relative humidity will be constant only if the amount of water vapor in the atmosphere increases as the temperature rises.
Constantmoisture and noxious chemicals ruin displays.
持续散发出的湿气和有毒化学物质会毁坏展品。
3
B. Maintain rammed earth with minimal moisture loss at relatively constant temperature for period necessary for hydration of cement and hardening of rammed earth.