The foam metal nickel has the advantage of good heat conductivity and the molten salt has the advantage of large heat storage quantityperunit weight or volume.
泡沫金属镍具有传热性能好,熔融盐具有蓄热量大、化学稳定性好等优点。
2
The bone mineral density (BMD) means the bony mineral quantityperunit area, which is an important index reflecting the metabolic status of the skeleton of human being.
骨密度是指骨单位面积所含的骨矿物量,它是反映人体骨骼代谢状况的一项重要指标。
3
The theory considers aggregates of quantity demanded by buyers and quantity supplied by sellers at each possible price perunit.