RS ASTM E1857: 2021 STANDARD GUIDE FOR SELECTING OF CLEANING
TECHNIQUES FOR MASONRY, CONCRETE, AND
STUCCO SURFACES
6,000.00
12
72,000.00
2
Rwanda Standards
RS ISO/IEC 24773-1: 2019 SOFTWARE AND SYSTEMS ENGINEERING —
CERTIFICATION OF SOFTWARE AND SYSTEMS
ENGINEERING PROFESSIONALS —
PART 1: GENERAL REQUIREMENTS