August 21, One Question per Day

2011-08-20View Original

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1. Please hide your replies; editing after posting is ineffective! Delete directly without hiding! 2. Hiding method: http://bbs.hcbbs.com/thread-492556-1-1.html. 5 points for correct answers; there is a reward for everyone who participates. Judgment: 1. The temperature for melting sulfur is generally maintained between 135~140°C; the higher this temperature, the better. 2. Adding a substance with certain properties to the friction surfaces of components in order to reduce wear is known as lubrication.

Reply #22011-08-20

Reply to 1# I love chemical engineering Wrong Right

Reply #32011-08-20

Reply to 1# I love chemical engineering Wrong Right

Reply #42011-08-20

1× 2√Reply 1# I love chemical engineering

Reply #52011-08-20

Reply to 1# I love chemical engineering xx

Reply #62011-08-20

Reply to 1# I love chemical engineering Wrong Wrong

Reply #72011-08-20

Reply to 1# I love chemical engineering Wrong Right

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August 21, One Question per Day

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