CREATE TABLE table_2001348_1 (revising_convention_s_ VARCHAR2, field VARCHAR2)

What was the revising convention of the field 'trimmers and stokers'?
SELECT revising_convention_s_ FROM table_2001348_1 WHERE field = "trimmers and stokers"
SELECT "revising_convention_s_" FROM "table_2001348_1" WHERE "field" = "trimmers and stokers"