Sand shield-filter
作者： Carl E Carter , Billy R Watson
DOI:
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摘要:
lens.org 参考文章(4)
Sr John Loyd Sparks, Filter liner for oil wells or the like ,(1954)
Everett J Gray, Fluid control and by-pass tool ,(1946)
William A Bruce, Oil-water separator for wells ,(1945)
Clyde D Pomeroy, Well screen washer ,(1953)