Grab and sediment are crawling all kinds of bulk goods can open and close the bucket. Widely applicable formations, other than chunks of floating gravel, bedrock, generally cover layer can be. But when the local layer of the SPT N value is greater than 40 degrees, use grab inefficient. Stratum containing large boulders, need not be completed with the use of heavy hammer impact drilling. Grab: Grab a common type. Grab the remote control: When in the closed state grab grab manufacturers, grab the goods to be released, just click the remote control transmitter manufacturer Henan grab control solenoid valve is energized Jilin grab, hydraulic system oil passage open, slip block the cylinder rod pulled out, against the upper bolster grab open the release of goods.