Thermoplastics pipes-Determination of longitudinal reversion
...ting hardened and tempered 热塑性塑料管材 纵向回缩率的标定 Thermoplastics pipes-Determination of longitudinal reversion 离心泵、混流泵、轴流泵以及漩涡泵试验要领 Test methods for centrifugal, mixed flow, axial and regenerative pumps ..
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