Петров, Сергей Михайлович. Огнеупорные материалы для изготовления литейных форм [Электронный ресурс]: учебное пособие по курсу "Технология литейных форм" / С.М. Петров; Санкт-Петербургский государственный политехнический университет. — Электрон. текстовые дан. (1 файл: 1,12 Мб). — Санкт-Петербург, 2014. — Загл. с титул. экрана. — Доступ по паролю из сети Интернет (чтение, печать, копирование). — Текстовый документ. — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/3650.pdf>.
|
Period
|
Read
|
Print
|
Copy
|
Open
|
Total
|
|
Year 2014
|
Quarter 1
|
3
|
0
|
3
|
0
|
6
|
|
Quarter 2
|
0
|
0
|
1
|
0
|
1
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
1
|
0
|
0
|
0
|
1
|
|
Year 2015
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
1
|
0
|
0
|
0
|
1
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
2016
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
2017
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
2018
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
2019
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
Year 2020
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
0
|
0
|
1
|
0
|
1
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
Year 2021
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
0
|
0
|
1
|
0
|
1
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
Year 2022
|
Quarter 1
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 2
|
1
|
0
|
0
|
0
|
1
|
|
Quarter 3
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
0
|
0
|
0
|
0
|
0
|
|
Total
|
6
|
0
|
6
|
0
|
12
|
