sand producer的意思|示意

When fishing the string fish in sand producer, string milling length should be optimized and a downhole string dynamic analysis model is established to calculate the length.

出砂井落鱼管柱打捞需要对管柱的套铣长度进行选择，针对这一问题建立了井下管柱受力分析计算模型。

Color concrete brick is a novel decorative brick, which is made by dealed efflorescent sand and ground. stone with color HEC consolation (C-HEC) and special producer equipment.

彩色混凝土路面砖是利用彩色HEC固化剂(C - HEC)和专用生产设备处理风化砂、碎石屑制作新型装饰路面砖。