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X-Series PB-7910T Gas-Engine Backpack Leaf Blower. Echo’s yard machines rarely lack for power, but the PB-7910T backpack gas engine leaf managed to exceed expectations, maxing out with an air ...
A branch collar is the "shoulder" between the branch and trunk of woody plants; the inflammation formed at the base of the branch is caused by annually overlapping trunk tissue. [1] The shape of the branch collar is due to two separate growth patterns, initially the branch grows basipetally, followed by seasonal trunk growth which envelops the ...
Some vendors provide true blast shelters engineered to provide good protection to individual families at modest cost. One common design approach uses fiber-reinforced plastic shells. Compressive protection may be provided by inexpensive earth arching. The overburden is designed to shield from radiation.
Blast dampers usually employ some type of blade held open with tension from a spring. The damper blades close automatically when pressure overcomes the resistance offered by the spring. Various models differ in the amount of blast protection (e.g. 1 bar/14.5 psi or lower amounts of protection) and whether they stay closed after the blast or ...
The definition “half the total leaf area per unit horizontal ground surface area” is suitable for all kinds of leaves and flat or sloping surfaces. [4] A leaf area index (LAI) expresses the leaf area per unit ground or trunk surface area of a plant and is commonly used as an indicator of the growth rate of a plant.
(of a compound leaf) Having precisely two leaflet s, usually in a symmetrical pair, e.g. a leaf of Colophospermum mopane. Compare jugate lobed leaf, e.g. most species of Bauhinia. bifusiform Fusiform with a pinch in the middle. bilabiate Having two lips, e.g. the form of the petal s in many irregular flowers. bilateral 1.
This kind of protection was used by turret gunners during the Iraq War, to protect them against small arms fire and fragmentation. To increase overall protection, separate accessories can be added to the OTV: Collar device that is divided in two parts, a neck and collar protector and a throat protector; Groin protector.
Conditions conducive for rice blast include long periods of free moisture and/or high humidity, because leaf wetness is required for infection. [24] Sporulation increases with high relative humidity and at 25–28 °C (77–82 °F), spore germination, lesion formation, and sporulation are at optimum levels.