Leather Watchband is needless to say, sweat corrosion can cause premature hardening of belt cracking, normal maintenance should avoid sweating the wet period wear belt table.

皮表带就更不用说了，汗渍的腐蚀会使皮带过早硬化开裂，正常保养应该避免多汗多雨时期戴皮带表。

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B. Maintain rammed earth with minimal moisture loss at relatively constant temperature for period necessary for hydration of cement and hardening of rammed earth.

在相对稳定的温度下，确保夯实墙的最小湿度，以保证水泥的水化和夯实墙的硬化。

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During the tobacco hardening period bed of tobacco seedling was the falling target of alate aphids and was the main resource of tobacco virus spread by aphids.

炼苗期烟草苗床是传毒介体有翅蚜着落的靶子中心，是烟田蚜传病毒病的主要初侵染源，为防治烟草蚜传病毒病的关键时期。

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