在不同的压缩空气相对湿度下，试验测定了低压铸造过程中液态铝合金氢含量的变化。
Changes in hydrogen content in liquid aluminum were measured under different relative humidity of compressed air in low pressure die casting.
通过对样品的采集、洗脱、消化水解、条件试验及抗干扰试验，证实本法能准确测定空气中微量尿素尘的含量。
Through collecting, dehydration, conditioned test and anti-jamming test of the sample, the content of trace urea dust in the air can be exactly determined by way of such technique.
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