わたくし書箱 しょそう番号 ばんごう
watakushisho sō bangōde

Noun
Da Copula

て-form: Used to connect clauses, make requests, or chain actions of 私書箱番号

1. -te form: connecting clauses; -te form: making requests; -te form: chaining actions; ; Private mailbox number

Te-Form
Computing