This sample has been burned in the bottom because the venting is not good, we can add an insert in the middle of the rib.
这个样板的筋骨位底部烧焦,是因为排气不良,我们可以在筋骨位的中间增加一个镶件。
2
An effective control of cracks at oil-reserving bottom comes from increasing strength of the bottom by thickening reinforcing rib, and increasing frequency by reducing noise also achieves.