Mandarin:
压实石墨铸铁

Explanation in English Language (EN):
A type of cast iron with graphite in a vermicular (worm-like) shape, combining the thermal conductivity of gray iron with the strength of ductile iron.

Explanation in Mandarin (ZH):
一种石墨呈蠕虫状（虫形）的铸铁，结合了灰铸铁的导热性和球墨铸铁的强度。

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International Phonetic Alphabet (IPA)
- Definition: A standardized system of symbols used to represent the sounds of spoken language.
- Purpose: Helps linguists, language learners, and educators accurately describe pronunciation across languages.
- Example: The word “hello” in British English is transcribed as /həˈləʊ/ in IPA.