Recent Entries
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To understand the advanced support of tunnel pipe shed at one t
Original title: Understand the advanced support of tunnel pipe shed at one time. There are too many detailed words. You need to collect them first! Source: Zhulong Forum Copyright belongs to the original author. As an auxiliary method of tunnel excavation, pipe-roof advanced support technology plays... -
Geological down-the-hole drill _ rock drilling
Original title: Geological down-the-hole drill Down-the-hole drill Portable down-the-hole drill is a new type of energy-saving and efficient rock drilling equipment,overburden drilling systems, which is widely used in medium and small mines,fastest dth hammer, road construction, national defense, mi... -
The most complete knowledge of open-pit mining, mining people h
Original title: The most complete knowledge of open-pit mines has been collected by miners! Strip mining is the extraction of valuable minerals from open pits. Mechanical mining: mining hard ore and rock, with deep-hole blasting and mechanical mining as the main means to obtain ore. Manual mining: P... -
"2018 Top Ten Chinese Hob Brands General Evaluation List" Glory
Original Title: "2018 Top Ten Brands of Chinese Hob" Honorably Announced "Top Ten Brands of Chinese Hob in 2018" is the most extensive and largest comprehensive brand strength ranking activity sponsored by Brand Ranking Network. This selection, collecting tens of thousands of netizens to vote and co... -
The decarboxylation reaction, which has been studied for more t
Original title: The decarboxylation reaction, which has been studied for more than 200 years, can become a hot spot again in this way. Previously, we introduced the recent progress in the study of photoredox-catalyzed C (sp 3) -H arylation reactions (). This kind of reaction mainly involves the form... -
Precautions for use and maintenance of rotary evaporator _ vacu
Original title: Precautions for use and maintenance of rotary evaporator Rotary evaporator is a kind of evaporation instrument widely used in laboratory. It is suitable for reflux operation, rapid evaporation of a large amount of solvents, concentration of trace components and reaction processes req... -
[Hotspot!] Kangri Baiao Successfully Completed 50 L to 2000 L P
Originally published as [Hot!] Kangri Baiao Successfully Completed 50 L to 2000 L Partner Project Production February 2022, Suzhou Kangri Baiao has completed the partner 2000 L clinical phase II sample production project in December 2021, which is directly enlarged from 50 L to 2000 L, which not onl... -
Short-path molecular distillation equipment operation process _
Original title: Operation process of short-path molecular distillation equipment During the operation of the short-path molecular distillation equipment, it is necessary to pay attention to certain operation procedures to avoid the unavailability of the entire short-path molecular distillation equip...