According to the actual test, road laying welded wire netting than artificial help, can reduce the crack occurs above 75%.
据实际测试，道路铺设焊接钢丝网比人工帮扎网，能够减少75%以上的裂缝发生。
2
The test pieces with crack enclosed have been detected after the crack preventing.
并对止裂与封闭后的试样进行了有关的检验和测试。
3
The fault effects on restrict layer debonding and crack burning were studied by simulated test in order to provide analysis basis of fault diagnostics for solid rocket engine.