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* Delivery to Metro Manila addresses may take up to 3-5 working days. Provincial deliveries may take 7 working days or longer.
* Not Applicable for Pre-Order or Special Order Items
* Deliveries during sale promotions and holiday seasons may take longer than usual.
* National Book Store may postpone processing and deliveries in case of flood and other natural disasters to ensure the safety of its personnel.
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Welding is a materials joining process in which two or more parts are coalesced at their contacting surfaces by a suitable application of heat and/or pressure. Many welding processes are accomplished by heat alone, with no pressure applied; others by a combination of heat and pressure; and still others by pressure alone, with no external heat supplied. In some welding processes a filler material is added to facilitate coalescence. The assemblage of parts that are joined by welding is called a weldment.
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