To prevent this various implements, such as disk harrows and specially constructed rollers, may be used to consolidate the upper stirred portion of the soil and place it in close capillary relationship with the lower unmoved layer.
The pipes are best supported on rollers which allow of movement without straining the joints.
In Louisiana two mills, set one behind the other, each with three rollers 32 in.
Air goods, such as cushions, beds, gas bags, and so forth, are made of textile fabrics which have been coated with mixed rubber either by the spreading process above described, or by means of heated rollers, the curing being then effected by steam heat.
The ropes are supported between the rails and guided on curves by rollers and sheaves.