“真空插管井”实际类似压水机井中的一种“吊管井”(区别于另一种滤水眼的花管中)。不同的是这种吊管井井管比较粗,一般是3英寸或4英寸口径的钢管。井的深度一般是10米左右;使用4寸离心泵,每小时可分出水40—50立方米。一小时可浇一亩地。在通县永乐店农场已推广这种井200多眼。科学实验证明,这种井的出水量稍大于该地的60—80米深的大型机井。有的生产队用三眼真空插管井可以保证200亩水稻(旱 The “vacuum tube” actually resembles a “pipette” in a press well (as opposed to a pipe in another filter). The difference is that the crane tube wells thicker, usually 3-inch or 4-inch diameter steel pipe. The depth of the well is generally about 10 meters; using 4-inch centrifugal pump, the water can be divided 40-100 cubic meters per hour. One hour can pour an acre of land. Yong Tong stores in the county farm has been promoting more than 200 such wells. Scientific experiments show that the water output of this well is slightly larger than that of the 60-80 meter deep large-scale well. Some production teams use three-hole vacuum tube can guarantee 200 acres of rice (drought