From microscopic robots that can carry and deliver drugs inside the human body to tiny particles that can detect and break ...

Such as: Problem: Difficulty in maintaining desired vacuum. Vacuum fans are operating properly. Uncommon cause and solution: Worn vacuum seed plates. Holes in seed plates may also be worn slightly ...

Problems 1. Building a house There was little wood to build log cabins. Solutions Settlers built 'sod houses', while they lived out of doors - people did their cooking on an open fire. Problems 2.