Work period of current is big, copper wire high temperature (550 degrees), if the working section has air exist, copper and oxygen in heating conditions produce copper oxide.
工作段电流大，铜线温度高(550度左右)，如果工作段内有空气存在，铜和氧气在加热的条件下就产生氧化铜。
The high temperature plug agent made mainly from larch tannin is applied to plugging water at high temperature and adjusting section for oil extraction in oil field.
以改性落叶松栲胶为主料研制的高温堵水剂，适用于油田采油用高温堵水、调剖凝胶。
The velocity and temperature distributions are nonuniform on cross section. The velocity is small and the temperature is high close to the pipe wall.
管道横截面上的速度、温度分布不均匀，越接近管壁速度越小，温度越高。
And then, the rational form of section and permanent support of primary tunnel in high-temperature mine is put forward.
进而提出热害矿井主要巷道的合理断面形式和永久支护形式。
The technical investigation of relieving residual stress on the surface of rectangular cold drawn section by means of high temperature heat treatment was provided.
提出用高温近火方法来改善矩形截面冷拔型钢表面残余应力的工艺探索。
The swell factor tends to decrease if the cross section of die crown is large, the die round R is small, the runner is large, the dumping temperature is high and the extrusion speed is low;
口型的冠部截面大、口型圆角R小、流胶口大，排胶温度高，挤出速度慢，则膨胀因数小；
The heating tubes in the 1st section mainly suffer from corrosion of dissolved oxygen while those in the 2nd section suffer from erosion corrosion of high-temperature steam.
其中第一、二节热器管内主要为溶解氧腐蚀，而盘管内主要为高温蒸汽的冲刷+腐蚀。
Conclusion the optimum temperature for frozen section machine, the choice of embedding medium, frozen time is the key to producing high-quality frozen sections.
结论冰冻切片机的适宜温度、包埋剂的选择、冰冻时间等是制作优质冰冻切片的关键。
The installation comprises two finned tube heat transfer sections which are made of different materials of the high-temperature heat transfer section and the low-temperature heat transfer section.
该装置包括两个不同材料制成的肋片管式换热段，分别为高温换热段和低温换热段。
The installation comprises two finned tube heat transfer sections which are made of different materials of the high-temperature heat transfer section and the low-temperature heat transfer section.
该装置包括两个不同材料制成的肋片管式换热段，分别为高温换热段和低温换热段。
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