Rail Transit Equipment Keyword Candidate Study

Filter-difference study

Against the 290-record Rail Transit Components Braking Doors Keyword Candidate Study, this 259-record cohort shares 257 records. Only 2 occur here and 33 only in the reference; the union contains 292. These are filter-membership differences, not company entries or exits.

An ID-deduplicated archive snapshot, not the whole market, current recognition or operating results.

The largest recorded sub-industry participation gap is for Automotive structural parts and components: 7/259 here versus 19/290 in the reference, an absolute difference of 3.8 percentage points. The cohorts have overlapping company IDs and are not independent samples.

Zero means no recorded label, not no business; multi-label cells overlap.

Multi-label counts can overlap; filter compliance is not industrial advantage.

Existing excerpts do not certify entire old reports; list linkage is not final recognition. Full definitions are on the series page.

Fields can overlap; hits establish search relevance only.

Control and communications need system-validation scope

The Pumps, valves and fluid control label covers 2 records (0.8% of this cohort). This archive clue raises a verification question about Control and communication systems or vehicle integration with validation documents; it does not establish that these companies already deliver it.

Shared records with Rail Transit Components Braking Doors Keyword Candidate Study: 257; records in this cohort but outside that set: 2. The intersection/union ratio is 88.0%, a measure of label overlap rather than business collaboration. Read comparison

Shared records with Automotive and transport equipment / Core components and digital hardware Supply-chain Study: 72; records in this cohort but outside that set: 187. The intersection/union ratio is 10.4%, a measure of label overlap rather than business collaboration. Read comparison