求翻译：在保证型腔内气体排出通畅的情况下，对要求同时凝固的铸件可采取较高的浇注速度，对要求顺序凝固的铸件尽可能采用较低的浇注速度。是什么意思？

Gas discharge in the cavity to ensure smooth case, while the solidification of castings can be required to take a higher casting speed, the solidification of the casting requirements as a lower casting speed.

To ensure smooth transition cavity gas emitted from the solidification of castings, the request may be taken simultaneously with higher speed, to request the pouring sequence castings solidification of the note as possible, use a lower speed.

The gas discharges in the unobstructed situation in the guarantee die space, to requests the casting which simultaneously coagulates to be possible to adopt the high casting speed, to requests the casting which the order coagulates to use the low casting speed as far as possible.

In the case of guarantee smooth gas discharges in the cavity, simultaneously solidifying casting of casting to take a higher speed, requires Directional solidification of the casting of casting as possible with a lower speed.

Gas discharge in the cavity to ensure smooth case, while the solidification of castings can be required to take a higher casting speed, the solidification of the casting requirements as a lower casting speed.