求翻译：砼浇注：施工时分层浇注，逐层振捣，上层振捣要插入至下层5～10cm，同时要根据振捣时表面泛浆、模板缝渗透等准确判断振捣时机，做到既不欠捣也不过振。是什么意思？

Concrete pouring: the construction of layered casting, layer by layer vibrator, vibrator to be inserted to lower the upper 5 ~ 10cm, while according to the vibrating surface of the pan when the slurry, templates, sewing penetration vibrator accurately determine the timing, do not under-pound nothing

Note: During the construction process on behalf stratified pour, case-by-case basis with the upper layer 次 次 to lower you want to insert 5 ~ 10 cm, and at the same time when 次 surface under the pan syrup, templates, such as sewing infiltration 次 accurate judgment time, so that they are not owed but

tong casting: When construction the lamination casting, the cascade inspires pounds, the upper formation inspires pounds must insert to lower level 5~10cm, simultaneously must act according to inspires pounds when the superficial mudslide, the template seam seepage and so on the accurate judgment in

Concrete casting: construction layer when casting, layer by layer vibrating, upper-class vibration you want to insert to the lower 5~10cm, according to the vibrating at the same time, template, sewing surface Pan pulp permeability determine accurately the vibrating the timing, so neither owes stamp

Concrete pouring: the construction of layered casting, layer by layer vibrator, vibrator to be inserted to lower the upper 5 ~ 10cm, while according to the vibrating surface of the pan when the slurry, templates, sewing penetration vibrator accurately determine the timing, do not under-pound nothing