See Impact MolingMethod of creating a bore using a pneumatic or hydaulic hammer within a casing, generally of torpedo shape. The term is usually associated with non-steered or limited steering devices without rigid attachment to the launch pit, relying upon the resistance of the ground for forward movement. During the operation the soil is displaced, not removed. An unsupported bore may be....
Burying a pipeline by pulling a plough through the ground while a continuous length of pipe is fed into the top of the plough and laid out underground from the tail of the plough. An alternate ploughing technique may use a plough blade with a bullet at the end to create a tunnel beneath the surface into which a pipe may be pulled.
The ratio of the weight average molecular weight to the number average molecular weight. This gives a preliminary indication of the range of molecular weights.
A minimum excavation procedure for the construction of pipelines. In collection system re-engineering, moling is typically used as a form of on line replacement, breaking aside the existing sewer fabric and pulling through a new structural lining.
Function of some property of a body or figure – such as weight, mass, volume, area, length, or position, equal to the summation of the products of the elementary portions by the squares of their distances from a given axis.