IEC60335中的22.32中的这段话怎么解释?(已解决)

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iec60335中关于判定陶瓷是否紧密烧结中的这段话怎么理解? 先谢过!

The ceramic material is broken into pieces that are immersed in a solution containing 1 g of
fuchsine in each 100 g of methylated spirit. The solution is maintained at a pressure not less
than 15 MPa for a period so that the product of the test duration in hours and the test
pressure in megapascals is approximately 180.

jason1031

把陶瓷材料敲碎后浸入每100g甲基化酒精加1g品红的溶液中，溶液维持在某个不小于15Mpa的压力，并且测试的时间(以h为单位)和溶液压力(以Mpa为单位)的乘积不小于180。

dfcmie

要自己做个设备的

踏雪寻梅

The solution is maintained at a pressure not less
than 15 MPa for a period so that the product of the test duration in hours and the test
pressure in megapascals is approximately 180.
怎么是之积，应该是之和，用了“and”