Sew or patch tears as soon as they happen. If the hole gets too big, clothing becomes cleaning rags.
哪里坏了一点就尽快的修补。要是这个洞变得太大，这个衣物就只能用作抹布了。
The large, complex and irregular investment casting mold was successfully designed by property arrange technology hole for core cleaning and use combinative core.
通过开设适当的出芯工艺孔，利用组合型芯，成功地设计出了大型、复杂、不规则熔模铸件模具。
RSDS will control well path accurately, reduce torque and drag remarkably and improve hole cleaning condition obviously. The drilling practices of ERD will be more reliable if RSDS is used.
用旋转导向系统RSDS进行大位移井钻井，可望相当准确的控制井眼轨迹，大幅度减少钻柱所受的摩阻和扭矩，显著改善井眼的清洁状况。
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