预松开时间 Early warning splayed out time ; Pre-release time

预算松弛 Budgetary slack ; Budget Slack ; budget laxity

土岩预松 preliminary loosening of sediments

预应筋松弛 relaxation of prestressed tendon

松弛预算 slack budget

松驰预应力钢绞线 loose prestress hinge wire

松驰预应力钢丝 loose prestress steel wire

预防骨质疏松 preventing osteoporosis ; prevention of osteoporosis

预分散松香胶 Neuphor