In this paper it is discussed how the material should be reasonably selected in machine design according to its strength, stiffness and density, so that the weight of machine parts can be lighten.

叙述机械设计过程中，如何根据材料强度、刚度与密度之间的相对关系，合理选择材料，以减轻机械构件的重量。

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Lula wants Mr Sarney to swing the weight of the PMDB, and its patronage machine, behind Dilma Rousseff, the probable candidate of the ruling Workers' Party in the presidential election next year.

ECONOMIST: What Britain��s MPs might learn from Brazilian Senators

Home Dialysis Plus in Portland, Oregon has an all-in-one dialysis machine that is half the weight of NxStage's and uses ink-jet technology from Hewlett-Packard to continuously mix small amounts of dialysis solution on the fly.

FORBES: Magazine Article

Home Dialysis Plus in Portland, Ore. has an all-in-one dialysis machine that is half the weight of NxStage's and uses ink-jet technology from Hewlett-Packard to continuously mix small amounts of dialysis solution on the fly.

FORBES: The Home Cure