placer造句
31) Pinggui Sn placer in Guangxi was discovered and exploited as early as the Bronze Age.
32) Mechanized placer mining, with special devices for washing and separating waste from valuable minerals, is used in productive alluvial deposits.
33) Placer mining is based on the FACT that heavier substances can be separated from lighter ones in water.
34) The operation practice indicated that the remining of placer gold in Laozuoshan Gold Mine was efficacious.
35) In this thesis, placer based on optimizing the power consumption of clock gating network is presented.
36) This primitive form of placer mining is still used in some places for panning gold.
37) The fineness of placer gold in this district is apparently featured by inhomogeneity, inheritance and afterdeformation.
38) Then, dispersal gold placer within the intermediate store body was enriched in gravel bed of detention in river bed after many times intermittent elevation, and the gold placer deposit was formed.
39) "He was concerned he wouldn't measure up to the rest of the group, " said Randy Yost, committee chairman and former CEO of Placer Bank of Commerce in California.
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