河道砂岩体在横切河道的地震剖面上一般表现为充填反射状的顶平底凹的单透镜体；
On seismic profile cross-cut the channel, it generally presents as a lenticle with flat top and concave bottom and has the character of infilling in reflection.
相同的原理用到这儿关于推出任何内部模型凹穴，也就是说零件在顶出时必须能自由扩张答应形成的模型凹穴通过型芯的约束。
The same principle applies here as to stripping any internal undercut i. e. the molding must be free to expand during ejection to permit the molded undercut to ride over the restriction on the core.
于上架梁的下方固定有顶杆和凹模，于下架梁上安装有其一端部至少有一个肩凸的型芯。
An ejector rod and a female die are fixed at the lower part of the upper beam, and a mold core is mounted on the lower beam. The end of the mold core has at least one shoulder.
应用推荐