How we prepare and correct technical content

Who is responsible

Hefei RollMaster Industrial Co., Ltd. operates this site and receives content corrections at [email protected]. The company identity and contact details are owner-declared in this site's configuration and public contact pages.

How content is prepared

We collect public standards, manufacturer documents, data sheets, test material and industry sources. Each source keeps its original URL and retrieval date. We extract claims together with units, test conditions and scope before writing a buyer-focused explanation.

Source boundaries

A manufacturer or supplier value describes that product or test. It does not automatically establish an industry-wide rule. Standards are shown with their scope and version when available. Missing conditions stay marked as unknown instead of being guessed.

How we check it

Before publication we check source support, numbers, units, product identity, citation coverage, usefulness and readability. A failed article or product page is held back while its evidence or wording is repaired.

Corrections and dates

Send the page URL, the statement in question and the supporting document to [email protected]. We record the review. A modified date changes only when the substance, evidence or scope changes; a rebuild alone does not reset it.

Scope

This site provides technical decision support for sourcing and comparison. It is not a substitute for a project engineer's design approval, a conformity assessment, a safety certification or a contract specification.