How long can we continue to supplement agroecosystems with energy derived from declining fossil fuel supplies?由于矿物燃料供应量下降,我们供应农业生态系统能量能持续多久?Power Industries – Nuclear, Fossil Fuel, Combined Cycle, Cogeneration and Distri...
Fixtures are generally mechanical devices used to assist ma - chinking, assembly, inspection, welding, and other manufacturing operations.工装夹具主要是机械制造如机加工, 装配, 检验, 焊接等的一种辅助机械部件.Rolls Royce’s unrivalled experience in high ...
In certain range flowability increases apparently with percentage of PF in mixture.在一定范围内,树脂含量的增加能够明显提高混合物的流动性.The adhesion and flowability of powders are measured by tamping vibration.阐述了由振实法测定的粉末的粘着力和流动性.External addit...
他是他们那一代最出色的击球手。He was the greatest batsman of his generation.她是个优秀的击球手,能把球击出二百米以外.She is an excellent hitter and able to drive the ball beyond 200 metres.罗恩·韦斯莱: 弗雷德和乔治也是队员. 他们是击球手.Ron Weasley: Fred and George are on the...