Below is the ASTM A17 (the oldest standard I have) which withdrawn in 1945.
The American Society for Testing and Materials (ASTM) was formed in 1898, founded by Charles B. Dudley, Ph.D., a chemist.
The oldest standard I have
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At 13.2 °C and below, pure tin transforms from the silvery, ductile metallic allotrope white tin (or β) having a …
رئیسی داشتم که پیرمرد دنیا دیده و البته تنهایی بود. تنها زندگی میکرد. یکبار ازش پرسیدم: “مهندس! شما چطور تنها زندگی میکنی؟ حوصلهات سر نمیره؟” پاسخ داد: “پسر جان! تو باید یاد بگیری چطور از تنهاییات لذت ببری، اونوقته که …
In below tables the elements are arranged by atomic number with the year of discovery and the discoverer. The discovery of an element made the discoverer well known and also gave credit to his/her country. Source: Encyclopedia of the Elements, …
Have you just graduated from university? Have you just started working in an engineering company? Whichever it is… I recommend …
