drawing of copper tubes 铜盘管拉拔
It showed that a fast cooling after drawing was of benefit to dimensional stability, straightness, environmental stress cracking resistance, and strength of the drawn tubes.
拉伸时的自然冷却会产生不均匀的产品，快速水冷却拉伸工艺能显著改善管的耐环境应力开裂性，成倍提高其强度。
The padded urethane cabinet top has a dished compartment for safe placement of test tubes and other blood drawing supplies.
填补乙烷基储存柜顶部带有一个用于安全存放测试试管和其他抽血装置的隔间。
Technical properties of capillary tubes for glass thermometers are given and a special recuperative tank furnace for vertically drawing these tubes is described.
本文介绍了温度计玻璃管的技术特点，以及垂直拉制这种玻璃管的小型换热式池炉。
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