Difference between fume hood standard NF X 15-211 and JG/T 385-2012

The NF X 15-211 standard was developed and promulgated by the French Standards Association (AFNOR) for the safety and quality standards for fume hoods and storage cabinets without ducted air. It is currently the most rigorous safety standard in the world. At the

Organize Massage Therapy

The surgeon holds the patient's limbs with his hands, then makes a loose, tight, top-to-bottom sequential movement and repeats them several times. With straightening tendons and efficacy, indications of limb pain, numbness, fatigue. …

Attention to the management of edible fungi

A: The intertidal management of straw mushroom has three key points: First, prevent pests from invading. Once found, they should be completely killed in the first time. Second, the prevention and control of disease-causing bacteria can be used in moderation in the intertidal zone, such as

Cultivation points of greenhouse leeks

1. Choose good breeds. Choose color palate with good palatability, high yield, strong resistance, and cold resistance, such as Dahongpao and Quanyehong.

2. Soil preparation. Deep ploughing of greenhouse soil by 15 to 20 cm, combined with deep plowing of 3,000 kg of high-quality organic fer

What should be paid attention to when picking melons?

Answer: Chang Zongtang, a consultant from Yangling Old Association of Science and Technology and a researcher at Northwest A&F University, said that the points to note when picking melons are: 1. Stop watering 7 days before harvesting to reduc

How old orchards are renewed

Pruning the main branch extension branch When the main branch and side branch extension branches are weakened, you can choose the back branch with a small growth angle as the main branch and side branch extension culture at the front part of the m