摘要：【中文】本发明涉及一种安装到挖掘机等建筑设备而活塞下降来对杆进行打击，由此杆对地基的岩层等进行破碎的液压打击装置，尤其，涉及一种可根据地基的岩层的状态感测在活塞与汽缸之间具备到上部的上部腔室的压力大小而自动转换打击模式的液压打击装置。 【EN】The present invention relates to a hydraulic striking device which is mounted to construction equipment such as an excavator, and which breaks a rock formation of a foundation by a rod by lowering a piston to strike the rod, and more particularly, to a hydraulic striking device which can automatically switch a striking mode by sensing a pressure level in an upper chamber provided between the piston and a cylinder in an upper portion according to a state of the rock formation of the foundation.

摘要：【中文】本发明涉及弹箭设计领域，尤其涉及一种直翼飞行稳定器,包括稳定支架、尾翼片、连接所述稳定支架和尾翼片的翼轴及使所述尾翼片展开的弹簧；所述稳定支架为圆筒形；所述尾翼片为直板状；所述尾翼片沿所述稳定支架圆周均匀设置多个，所述尾翼片轴线与所述稳定支架圆心重叠合,本发明能更好地提高弹箭结构的飞行稳定性。 【EN】The invention relates to the field of rocket design, in particular to a straight wing flying stabilizer which comprises a stabilizing bracket, a tail wing piece, a wing shaft and a spring, wherein the wing shaft is connected with the stabilizing bracket and the tail wing piece; the stabilizing support is cylindrical; the tail wing pieces are straight plate-shaped; the tail wing pieces are uniformly arranged along the circumference of the stabilizing support, and the axes of the tail wing pieces are overlapped with the circle center of the stabilizing support.