9 ฤดูกาล
69 ตอน
Inside the Factory - Season 4 Episode 8
Gregg Wallace is in Germany at a historic pencil factory where they produce 600,000 writing implements a day. Cherry Healey examines the astonishing properties of graphite. Historian Ruth Goodman traces the origin of pencils to a 15th-century graphite discovery in the Borrowdale valley.
- ประเทศ : United Kingdom
- ประเภท : Documentary
- ผู้อำนวยการ :
- นักแสดง : Paddy McGuinness, Cherry Healey, Ruth Goodman
