Article 501 provides the requirements for Class I locations, such as the refinery shown in Photo 1. In the May issue, we described the Division system outlined in the NEC, which further breaks down ...
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Everything you need to know about P-traps
With a history that goes back to 1775, the P-trap is an essential fixture in modern plumbing, especially after improvements by the legendary Thomas Crapper in the late 1800s. You’ll find this curvy ...
It stores the attachment ID (aid), thread/post IDs (tid, pid), author ID (uid), a download counter, and a tableid that identifies the data shard. Posted attachments: When a post is submitted, tableid ...
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