求翻译：目前国内企业在二通插装阀的阀块设计时，其内部交叉孔道壁厚大多采用经验值，一般控制在3～5mm左右，但对于应用于高压、大流量的二通插装阀的阀块而言，其内部孔道直径较大，上述经验壁厚值远远满足不了此类阀块的强度要求，而过大的壁厚又会造成材料的严重浪费。是什么意思？

Domestic enterprises in the two-way cartridge valves valve block design, the internal pore wall thickness of most empirical cross-value, the general control of about 3 ~ 5mm, but used in high pressure and large flow of two-way cartridge valves valves block, its internal pore diameter of greater wall

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Currently domestic enterprise in II pass plug loaded valve of valve block design Shi, its internal cross duct wall thick most used experience value, general control in 3~5mm around, but for application Yu high pressure, and large flow of II pass plug loaded valve of valve block,, its internal duct d

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