带 有孔洞的料筒有利于料球在高温真空还原时，镁、钙、锶蒸气的快速 扩散，缩短了反应时间。
When the pellets are reduced in high-temperature vacuum, the charging barrel with holes is beneficial to quickly dispersing steam of magnesium, calcium and strontium and shortening the reaction time.
背部每侧有对称的相同数量的穿孔洞。
It is a symmetrical piercing with an equal number of holes on each side.
基于ISO的国际标准，这些检测包括建立适合的容量和压力，检查是否有孔洞和其他可见的缺陷。
Based on international standards set out by the ISO,12 these include tests which establish bursting volume and pressure, and detect holes and other visible defects.
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