" some quadrupeds are not houses " becomes, by contraposition, " some thing not house are quadrupeds.

“某些四足动物不是马” ，以反言论法，变成了“某些不是马的东西是四足动物” 。

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Material self-delivery, contraposition by numerical controlled electronic eyes, mini adjust of four directions make a more accurate printing and reliable operation, repeat printing is accessible.

自动送料，数控电眼对位，前后左右微调校版，使印刷套位更加准确，操作方便可靠，可多次重复套印。

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