Comparison Experiments on Evacuating Capability of a High Vacuum Valve and a Zig-Zag Valve in Vacuum Die Casting Process是什么意思_Comparison Experiments on Evacuating Capability of a High Vacuum Valve and a Zig-Zag Valve in Vacuum Die Casting Process在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句