casing perforating造句

"casing perforating"是什么意思

造句与例句手机版

On June 20, 1840 she had her first arithmetic lesson, with the aid of a metallic case perforated with square holes, square types being used; and in nineteen days she could add a column of figures amounting to thirty.
It's difficult to see casing perforating in a sentence. 用casing perforating造句挺难的

相邻词汇

用"casing overlap"造句, 用"casing pack"造句, 用"casing packer"造句, 用"casing paper"造句, 用"casing patch"造句, 用"casing pipe"造句, 用"casing point"造句, 用"casing potential"造句, 用"casing preparation department"造句,

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