对电力电缆外护套厚度的检验若控制不当，就会增加操作难度和产品成本。
If controlling inappropriate in checkout of power cable outer sheath thickness, then will increase difficulty in operating and production cost.
在不增加操作难度的情况下，用两台模拟调节器即可实现三回路串级调节。
The triple loop cascade regulation can be easily controlled by using two analogue regulators.
结论在骶骨肿瘤切除手术中应用腹主动脉阻断比髂内动脉结扎技术更能有效控制术中失血量，而且并不会增加手术操作难度及延长手术时间。
Conclusions: To control the intra-operative blood loss and less the operative time, either abdominal aorta block or internal iliac artery ligation is suitable, without serious complications.
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