heat - high temperatures, pressure - loads from expanding gases or liquids, vibration - continuous high-frequency movement or shaking, shocks - sudden impacts, abrasion - damages to surfaces caused by friction ,

द्वारा

लीडरबोर्ड

दृश्य शैली

विकल्प

टेम्पलेट स्विच करें

ऑटो-सेव पुनःस्थापित करें: ?