The air claw is driven by the cylinder to move so as to throw the work piece to be detected, which can automatically carry out a dropping test.
利用气缸驱动气爪运动来抛落待测工件，可自动地进行跌落试验。
Black conversion film with non-chromate was obtained on a cast aluminum alloy by chemical methods, and the anticorrosion properties of the film were evaluated by means of dropping test.
用无铬化学方法在铸铝合金表面制得黑色转化膜，利用点滴试验评价了膜的耐蚀性能。
Black conversion film with non-chromate was obtained on a cast aluminum alloy by chemical methods, and the anticorrosion properties of the film were evaluated by means of dropping test.
用无铬化学方法在铸铝合金表面制得黑色转化膜，利用点滴试验评价了膜的耐蚀性能。
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