求翻译：水泥浆拌和时，首先将水加于拌和机内，再放入水泥，经充分拌和后，再加入掺加料，拌和时间不少于2分钟。水泥浆自调制至压入孔道的持续时间，不宜超过30～45分钟。是什么意思？

Slurry mixing, the first increase in mixing the water inside, and then into the cement, after adequate mixing, then add mixing materials, mixing time of not less than 2 minutes. Grout into the pore pressure from the modulated to the duration should not exceed 30 to 45 minutes.

At the outset, mud mixed with water and add enough water to mixing and just put it in the machine and, after a full cement mixing and mixing, and then adding after charging, mixing and period of no less than 2 minutes. Since modulation to put pressure on water slurry into the vents in time, preferab

When the cement mortar mixes up, first adds the water in the mixer, again puts in the cement, after mixes up fully, then joins mixes the feeding, the mixing time many in 2 minutes.The cement mortar to presses in the passageway from the modulation the duration, surpasses 30~45 minutes not suitably.

When cement slurry mixing, first of all the water on the mixer, and then into the cement, after thoroughly mixing, then mixed with feed, the mixing time of not less than 2 minutes. Cement slurry from modulation to pressure into the ducts of duration, not more than 30-45 minutes.

Slurry mixing, the first increase in mixing the water inside, and then into the cement, after adequate mixing, then add mixing materials, mixing time of not less than 2 minutes. Grout into the pore pressure from the modulated to the duration should not exceed 30 to 45 minutes.