... shell clearance 扩孔器与钻头直径之差 shell deposit 介壳沉积 shell expansion plan 外板展开图 ...
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It is successful to re-melt deposit pure copper rotating band on D-30 shell body by using the process.
本研究探索了一种新的焊接工艺方法—熔敷扩散焊接方法,采用该方法在30口径弹体上焊接纯铜弹带取得成功。
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The deposit, discovered by Shell in 1992, is thought to contain between 2.6 trillion and 4.3 trillion cubic feet of natural gas, enough to supply the Batangas facilities for at least 20 years.
CNN: Up from the Ocean
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