2020
This work lays the foundation for lithographic 3D printing in seagoing oceanographic and naval applications , and additionally presents an economical approach for producing custom waterproof pressure housings in the field .
 lithographic 3D printing, seagoing oceanographic, naval applications, waterproof, pressure housings
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 lithographic 3D printing, seagoing oceanographic, naval applications, waterproof, pressure housings