Standards & Symbols on the drawing Plastic Moulded parts

[COLOR=#333333][FONT=Verdana]Hello group.[/FONT][/COLOR]

[COLOR=#333333][FONT=Verdana]Looking for [/FONT][/COLOR][B]Standards Number that can explain the meaning of symbols used on drawings of Plastic Molded Parts[FONT=Verdana].[/FONT]

[/B][FONT=Verdana]Recently I found website, and drawing of molded part (attached below).[/FONT][B]

ISO 20457:2018 - Tolerances for plastic moulded parts - Information on the new standard

[/B][FONT=Verdana]Some symbols specified on the drawing used only on drawings of molded parts and we did not meet it in the past.[/FONT]

[FONT=Verdana]Could anyone to advise Standards Numbers that can explain the meaning of these symbols?[/FONT]​[FONT=Verdana]

[/FONT][ATTACH=CONFIG]2773[/ATTACH]

ISO 20457
ISO 10135

From left to right:

Part Ejector locations, size, and markings,
Sink marks not greater than,
Surface Enlargement allowed for manufacturing optimization

- and the site you linked to (removed) provided training on the interpretation of the annotation.