A pump jack scaffold must be fitted with two positive gripping mechanisms to prevent slippage. Pump jacks are a uniquely designed scaffold consisting of a platform supported by movable brackets on vertical poles. The brackets are designed to be raised and lowered in a manner similar to an automobile jack. It is important to make sure that pump jack brackets have two positive gripping mechanisms to prevent any failure or slippage.
What happens when you pour water in a glass? It takes the shape of the glass. This means that water can't have a fixed shape or volume
Oncology is the study of cancer, so the doctors are called oncologists
