The utility model relates to the head of a twisting machine, in particular to a twisting machine head with single inner spring.

本实用新型涉及拧丝机的机头，具体为内装单簧拧丝机头。

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The nail type signet has buffering function by making use of the inner spring of a signet handle and the shim of a signet neck to adapt the stamped objects of different states.

利用戳柄内弹簧和戳颈垫片，使之在操作时具有缓冲功能，以适应不同状态的被盖物。

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This article is evaluation of the inner environmental condition on a closed house for weaners on the base of the data of the observations in winter, spring and summer.

在系统观测封闭式断奶仔猪舍春、夏、冬季舍内空气温热及卫生状况的基础上，对其空气环境状况进行了评价。

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