heat treatment

Black is charged (bright) (is it black? ) blackening

Mark mark

Number of amendments (number of amendments? )

Modify,

Sign it.

Material thickness material thickness

Drawing of product drawing of keel hook

Size, dimensional tolerance, angular tolerance, review, approval, view, serial number, drawing number, name, material, etc.

Almost, some people will use the past participle (with or without by) when designing, reviewing and approving. Some translations are flexible and can be abbreviated, which are different at home and abroad.