Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_20 ( technology VARCHAR, toxic_materials VARCHAR, moving_parts VARCHAR )

### Question ###
What's the technology when there are no moving parts but yes to toxic materials?

### Accurate SQL ###

SELECT technology FROM table_name_20 WHERE toxic_materials = "yes" AND moving_parts = "no"