本实用新型公开了一种记忆延时角大,输送讯号密的记忆延时机构,适用于纺织业中用机械式记忆延时机构的自调匀整装置的改进与改造,例如毛CO7型自调匀整装置.在不改变原毛纺工艺条件及设备主要结构的情况下,就可将记忆延时角θ增大到200°～250°,使毛条的匀整精确度提高30%以上.而且加工工艺简单,制造方便,成本低廉...
PneumoconiosisPneumoconiosis. Proceedings of the International Conference, Johannesburg, 1969. Ed. by ShapiroH. A., Ph.D., M.B., Ch.B., F.R.S.S.Af. Cloth, $32.00. Pp. 652, with numerous figures and tables. New York, Oxford University Pre... Pendergrass,Eugene,P. - 《Radi...
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A device for collecting aseptic liquid specimens comprising, a container having wall means defining a chamber and an opening communicating with the chamber. The device has liquid sampling means comprising, compressible liquid absorption means for receiving the liquid specimen, and handle means for suppor...