CN104374796A - Device for determining pomegranate freezing point and operating method of device - Google Patents
Device for determining pomegranate freezing point and operating method of device Download PDFInfo
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- CN104374796A CN104374796A CN201410693616.1A CN201410693616A CN104374796A CN 104374796 A CN104374796 A CN 104374796A CN 201410693616 A CN201410693616 A CN 201410693616A CN 104374796 A CN104374796 A CN 104374796A
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Abstract
The invention relates to a device for determining the pomegranate freezing point. The device comprises a freezing chamber, a copper-constantan thermal couple, a 0-degree constant-temperature device, a multi-channel microvolt-level data collecting and processing device, a computer and a concave groove, wherein the copper-constantan thermal couple is provided with a measuring head; the concave groove is put into the freezing chamber; the measuring head penetrates through the bottom of the concave groove; the rear end of the measuring head is wrapped by a tubular column which is movably arranged on the bottom of the concave groove via a connecting element and enables the measuring head to be smoothly inserted into pomegranate fruit. According to the invention, the arrangement of the concave groove is beneficial to the fixing of the pomegranate fruit, so that the measurement result is relatively precise; the arrangement of the tubular column is beneficial to the insertion of the measuring head into the pomegranate fruit; the measuring head is very small, is extremely low in thermal inertia, is flexible in response, and damages the original state of a tested tissue minimally, so that the measuring head measures temperature accurately, and has the advantage of simplicity, convenience, rapidness and accuracy.
Description
Technical field
The present invention relates to a kind of device and the method for work thereof that measure pomegranate freezing point, belong to postharvest technology of fruits and vegetables field.
Background technology
Juice of my pomegranate multi-flavor is sweet and containing multiple nutrients material, have very high healthy nutritive value.Higher with the content of abundant mineral matter element, particularly phosphorus, calcium, iron containing vitamin C, protein and 17 kinds of requisite amino acid of human body in guava juice; In pericarpium granati, the secondary metabolites such as bioflavonoid has multiple biologically active, has the functions such as anti-oxidant.Pomegranate is divided into sour pomegranate and the large class of pomegranate fruit two by seed local flavor.
But very easily physiological disease occurs in pomegranate storage, modal is pericarp browning, the internal cause of brown stain is the existence of browning substrates and the enhancing of PPO activity, and some outside Stress Factors particularly temperature become the inducement of brown stain.Research shows, temperature may exist two kinds of mechanism to the impact of pomegranate brown stain: certain chilling injury causes the brown stain of pericarp; High temperature then can cause the acceleration of cell old and feeble, and then causes the brown stain of pericarp; Suitable low temperature inhibits the activity of PPO, can suppress the generation of pericarpium granati brown stain to a certain extent.In recent years, people use the brown stain of the anti-browning agents such as citric acid to pomegranate to have certain inhibiting effect, but for the consideration to food security, fruit through natural method process receives an acclaim more, therefore the method for control temperature causes concern gradually, for the setting of fruit storage temperature, freezing point temperature is an important index, and pomegranate is different from other fruit, its pericarp, seed, carpels etc. constitute the structure of pomegranate complexity, the freezing point at each position may be not quite similar, therefore, comparatively complicated for its freezing test, also report is rarely had both at home and abroad.
There is following defect with in the method measuring pomegranate freezing point in the device of existing mensuration pomegranate freezing point: the pericarp that the gauge head of (1) measurement pomegranate temperature is hard relative to pomegranate fruit is softer, and therefore, gauge head not easily inserts pomegranate fruit through pericarp; (2), when measuring pomegranate freezing point, pomegranate is inconvenient to fix, and is easily subjected to displacement, and affects the precision of measurement result; (3) pomegranate is different from other fruit, and its pericarp, seed, carpel etc. constitute the structure of pomegranate complexity, and the freezing point at each position may be not quite similar, existing technologies can not sensitive, accurately, all sidedly measure pomegranate freezing point.
Summary of the invention
For the defect existed in prior art, the invention discloses a kind of device measuring pomegranate freezing point;
The invention also discloses a kind of method of work of said apparatus;
For the structural environment of pomegranate complexity, the present invention is intended to for pomegranate storage provides temperature data support, reaches accurate, sensitive, measures the object of temperature exactly.
Technical scheme of the present invention is:
A kind of device measuring pomegranate freezing point, comprise freezing room, copper-constantan thermocouple, 0 ° of thermostat, hyperchannel microvolt DBMS Acquisition Processor and computing machine, described freezing room, described copper-constantan thermocouple, described 0 ° of thermostat, described hyperchannel microvolt DBMS Acquisition Processor and described computing machine connect successively, described copper-constantan thermocouple is provided with gauge head, the device of described mensuration pomegranate freezing point also comprises a Baltimore groove, described Baltimore groove is placed in described freezing room, described gauge head is through the bottom of Baltimore groove, described gauge head rear end is surrounded by tubular post, described tubular post is movably arranged on the bottom of described Baltimore groove by web member, described tubular post makes gauge head insert pomegranate fruit smoothly.
The advantage herein designed is, being provided with of described Baltimore groove is beneficial to fixing pomegranate fruit, makes measurement result more accurate; Being provided with of described tubular post helps gauge head and inserts smoothly in pomegranate fruit; Described tubular post is movably arranged on the bottom of described Baltimore groove by web member, the described tubular post of convenient cleaning.
Preferred according to the present invention, the quantity of described gauge head is three or more.
The advantage herein designed is, the setting of three or more described gauge heads achieves the mensuration of pomegranate fruit different parts, makes the temperature of the pomegranate fruit of measurement more accurate.
Preferred according to the present invention, described three or more gauge head length are different, described three or more gauge heads comprise the gauge head measuring pomegranate fruit pericarp temperature, the gauge head measuring pomegranate fruit top layer fruit grain temperature and measure the gauge head of temperature of pomegranate fruit internal layer fruit grain, the length range measuring the gauge head of pomegranate fruit pericarp temperature is 1 ~ 1.5mm, the length range measuring the gauge head of pomegranate fruit top layer fruit grain temperature is 3 ~ 5mm, and the length range measuring the gauge head of the temperature of pomegranate fruit internal layer fruit grain is 2 ~ 4cm.
The advantage herein designed is, described three or more gauge head length are different, measures the temperature of pomegranate fruit pericarp, pomegranate fruit top layer fruit grain and pomegranate fruit internal layer fruit grain respectively.
Preferred according to the present invention, the diameter range of described gauge head is 0.5 ~ 0.6mm, and the diameter range of described tubular post is 0.8 ~ 1mm.
The advantage herein designed is, gauge head does very little, and gauge head thermal inertia is minimum, be quick on the draw, and minimally damage the virgin state of tested tissue, therefore, the temperature that gauge head records is more accurate.
Preferred according to the present invention, described freezing room is computer-controlled temperature adjustable low-temperature storage box, and the adjustable temperature scope of described freezing room is-40 ~-10 DEG C.
The method of work of said apparatus, concrete steps comprise:
(1) air dielectric temperature is regulated
Regulate freezing room, make the air dielectric temperature in freezing room be in-15 ~-12 DEG C of temperature ranges or-30 ~-28 DEG C of temperature ranges;
(2) gauge head is inserted
Pomegranate fruit is put into Baltimore groove, fixing pomegranate fruit, and gauge head is inserted pomegranate fruit;
(3) the temperature t of the pomegranate fruit measured
Copper-constantan thermocouple is utilized to measure the temperature t of pomegranate fruit;
(4) freezing test termination time point is determined
Air dielectric temperature in setting procedure (1) freezing room is T, as t≤(T+1) DEG C, is and measures termination time point;
(5) freezing curve is drawn
It is zero point that gauge head inserts the pomegranate fruit time, and the mensuration termination time point described in step (4) is terminal, and in this time interval, take time as horizontal ordinate, the temperature t of pomegranate fruit is ordinate, draws freezing curve;
(6) pomegranate fruit freezing point is determined
According to the freezing curve determination pomegranate fruit freezing point that described step (5) is drawn, when the temperature t of pomegranate fruit does not decline in time, the temperature t of this pomegranate fruit and the freezing point of pomegranate fruit.
Preferred according to the present invention, the insertion gauge head described in step (2), concrete steps comprise:
A, pomegranate fruit is carried out peeling, obtain the pomegranate fruit of part with pericarp, the exposed seed state of remainder;
B, to the arillate part of band, gauge head is thrust 1.0 ~ 1.5mm place of pomegranate fruit pericarp, other gauge head is thrust pomegranate fruit internal layer really in grain through pericarp, and the degree of depth is 1/3 ~ 2/3 of pomegranate radius; To the part of exposed seed, thrust in pomegranate fruit internal layer fruit grain through pomegranate fruit top layer fruit grain by gauge head, the degree of depth is 1/3 ~ 2/3 of pomegranate radius, is thrust by other gauge head in the fruit grain of pomegranate fruit top layer.
Beneficial effect of the present invention is:
1, being provided with of Baltimore groove of the present invention is beneficial to fixing pomegranate fruit, makes measurement result more accurate;
2, the pericarp that gauge head of the present invention is hard relative to pomegranate fruit is softer, and therefore, gauge head not easily inserts pomegranate fruit through pericarp; Being provided with of described tubular post helps gauge head and inserts smoothly in pomegranate fruit; ;
3, the setting of the present invention three or more gauge head makes the temperature of the pomegranate fruit of measurement more accurate;
4, the present invention three or more gauge head length is different, measures the temperature of pomegranate fruit pericarp, pomegranate fruit top layer fruit grain and pomegranate fruit internal layer fruit grain respectively;
5, gauge head of the present invention does very little, and gauge head thermal inertia is minimum, be quick on the draw, and minimally damage the virgin state of tested tissue, therefore, the temperature that gauge head records is more accurate;
6, the present invention measures the freezing point of pomegranate fruit different parts, have easy, fast, advantage accurately.
Accompanying drawing explanation
Fig. 1 is the structure enlarged diagram of Baltimore groove of the present invention;
Fig. 2 is the structural representation being with arillate pomegranate fruit;
Fig. 3 is the structural representation of the pomegranate fruit of exposed seed state;
Wherein, 1, gauge head; 2, tubular post; 3, web member; 4, pomegranate fruit pericarp; 5, pomegranate fruit internal layer fruit grain; 6, pomegranate fruit top layer fruit grain.
Embodiment
Embodiment 1
A kind of device measuring pomegranate freezing point, comprise freezing room, copper-constantan thermocouple, 0 ° of thermostat, hyperchannel microvolt DBMS Acquisition Processor and computing machine, described freezing room, described copper-constantan thermocouple, described 0 ° of thermostat, described hyperchannel microvolt DBMS Acquisition Processor and described computing machine connect successively, described copper-constantan thermocouple is provided with gauge head 1, the device of described mensuration pomegranate freezing point also comprises a Baltimore groove, described Baltimore groove is placed in described freezing room, described gauge head 1 is through the bottom of Baltimore groove, described gauge head 1 rear end is surrounded by tubular post 2, described tubular post 2 is movably arranged on the bottom of described Baltimore groove by web member 3, described tubular post 2 makes gauge head 1 insert pomegranate fruit smoothly.
The advantage herein designed is, being provided with of described Baltimore groove is beneficial to fixing pomegranate fruit, makes measurement result more accurate; Being provided with of described tubular post 2 helps in gauge head 1 smooth insertion pomegranate fruit; Described tubular post 2 is movably arranged on the bottom of described Baltimore groove by web member 3, the described tubular post 2 of convenient cleaning.
Described gauge head 1 quantity is three.
The advantage herein designed is, the setting of three gauge heads 1 achieves the mensuration of pomegranate fruit different parts, makes the temperature of the pomegranate fruit of measurement more accurate.
Described three gauge head 1 length are different, described three gauge heads 1 comprise a gauge head 1 of the gauge head 1 measuring pomegranate fruit pericarp 4 temperature, the gauge head 1 measuring pomegranate fruit top layer fruit grain 6 temperature and measurement pomegranate fruit top layer fruit grain 6 temperature, the length measuring the gauge head 1 of pomegranate fruit pericarp 4 temperature is 1mm, the length measuring the gauge head 1 of pomegranate fruit top layer fruit grain 6 temperature is 3mm, and the length measuring the gauge head 1 of the temperature of pomegranate fruit internal layer fruit grain 5 is 2cm.
The advantage herein designed is, described three gauge head 1 length are different, measures the temperature of pomegranate fruit pericarp 4, pomegranate fruit top layer fruit grain 6 and pomegranate fruit internal layer fruit grain 5 respectively.
The diameter of described gauge head 1 is 0.5mm, and the diameter of described tubular post 2 is 0.8mm.
The advantage herein designed is, gauge head 1 does very little, and gauge head 1 thermal inertia is minimum, be quick on the draw, and the virgin state of minimal damage tested tissue, therefore, the temperature that gauge head 1 records is more accurate.
Described freezing room is computer-controlled temperature adjustable low-temperature storage box, and the adjustable temperature of described freezing room is-40 DEG C.
Embodiment 2
A kind of device measuring pomegranate freezing point according to embodiment 1, its difference is, described gauge head 1 quantity is six.
The advantage herein designed is, the setting of six gauge heads 1 achieves the mensuration of pomegranate fruit different parts, makes the temperature of the pomegranate fruit of measurement more accurate.
Described six gauge head 1 length are different, described six gauge heads 1 comprise two gauge heads 1 of two gauge heads 1 measuring pomegranate fruit pericarp 4 temperature, two gauge heads 1 measuring pomegranate fruit top layer fruit grain 6 temperature and measurement pomegranate fruit top layer fruit grain 6 temperature, the length measuring two gauge heads 1 of pomegranate fruit pericarp 4 temperature is 1.5mm, the length measuring two gauge heads 1 of pomegranate fruit top layer fruit grain 6 temperature is 5mm, and the length measuring two gauge heads 1 of the temperature of pomegranate fruit internal layer fruit grain 5 is 4cm.
The advantage herein designed is, described six gauge head 1 length are different, measures the temperature of pomegranate fruit pericarp 4, pomegranate fruit top layer fruit grain 6 and pomegranate fruit internal layer fruit grain 5 respectively.
The diameter of described gauge head 1 is 0.6mm, and the diameter of described tubular post 2 is 1mm.
The advantage herein designed is, gauge head 1 does very little, and gauge head 1 thermal inertia is minimum, be quick on the draw, and the virgin state of minimal damage tested tissue, therefore, the temperature that gauge head 1 records is more accurate.
Described freezing room is computer-controlled temperature adjustable low-temperature storage box, and the adjustable temperature of described freezing room is-10 DEG C.
Embodiment 3
A kind of device measuring pomegranate freezing point according to embodiment 1, its difference is, described gauge head 1 quantity is nine.
The advantage herein designed is, the setting of nine gauge heads 1 achieves the mensuration of pomegranate fruit different parts, makes the temperature of the pomegranate fruit of measurement more accurate.
Described nine gauge head 1 length are different, described nine gauge heads 1 comprise three gauge heads 1 of three gauge heads 1 measuring pomegranate fruit pericarp 4 temperature, three gauge heads 1 measuring pomegranate fruit top layer fruit grain 6 temperature and measurement pomegranate fruit top layer fruit grain 6 temperature, the length measuring three gauge heads 1 of pomegranate fruit pericarp 4 temperature is 1.2mm, the length measuring three gauge heads 1 of pomegranate fruit top layer fruit grain 6 temperature is 4mm, and the length measuring three gauge heads 1 of the temperature of pomegranate fruit internal layer fruit grain 5 is 3cm.
The advantage herein designed is, described nine gauge head 1 length are different, measures the temperature of pomegranate fruit pericarp 4, pomegranate fruit top layer fruit grain 6 and pomegranate fruit internal layer fruit grain 5 respectively.
The diameter of described gauge head 1 is 0.55mm, and the diameter of described tubular post 2 is 0.9mm.
The advantage herein designed is, gauge head 1 does very little, and gauge head 1 thermal inertia is minimum, be quick on the draw, and the virgin state of minimal damage tested tissue, therefore, the temperature that gauge head 1 records is more accurate.
Described freezing room is computer-controlled temperature adjustable low-temperature storage box, and the adjustable temperature of described freezing room is-25 DEG C.
Embodiment 4
The method of work of the arbitrary described device of above-described embodiment 1-3, concrete steps comprise:
(1) air dielectric temperature is regulated
Regulate freezing room, make the air dielectric temperature in freezing room be in-15 ~-12 DEG C of temperature ranges;
(2) gauge head 1 is inserted
Pomegranate fruit is put into Baltimore groove, fixing pomegranate fruit, and gauge head 1 is inserted pomegranate fruit;
(3) the temperature t of the pomegranate fruit measured
Copper-constantan thermocouple is utilized to measure the temperature t of pomegranate fruit;
(4) freezing test termination time point is determined
Air dielectric temperature in setting procedure (1) freezing room is T, as t≤(T+1) DEG C, is and measures termination time point;
(5) freezing curve is drawn
It is zero point that gauge head 1 inserts the pomegranate fruit time, and the mensuration termination time point described in step (4) is terminal, and in this time interval, take time as horizontal ordinate, the temperature t of pomegranate fruit is ordinate, draws freezing curve;
(6) pomegranate fruit freezing point is determined
According to the freezing curve determination pomegranate fruit freezing point that described step (5) is drawn, when the temperature t of pomegranate fruit does not decline in time, the temperature t of this pomegranate fruit and the freezing point of pomegranate fruit.
Insertion gauge head 1 described in step (2), concrete steps comprise:
A, pomegranate fruit is carried out peeling, obtain the pomegranate fruit of part with pericarp, the exposed seed state of remainder;
B, to the arillate part of band, gauge head 1 is thrust 1.0 ~ 1.5mm place of pomegranate fruit pericarp 4, other gauge head 1 is thrust pomegranate fruit internal layer really in grain 5 through pericarp, and the degree of depth is 1/3 ~ 2/3 of pomegranate radius; To the part of exposed seed, thrust in pomegranate fruit internal layer fruit grain 5 through pomegranate fruit top layer fruit grain 6 by gauge head 1, the degree of depth is 1/3 ~ 2/3 of pomegranate radius, is thrust by other gauge head 1 in the fruit grain 6 of pomegranate fruit top layer.
Embodiment 5
The method of work of the device according to embodiment 4, its difference is, regulates freezing room, makes the air dielectric temperature in freezing room be in-30 ~-28 DEG C of temperature ranges.
Claims (7)
1. one kind measures the device of pomegranate freezing point, comprise freezing room, copper-constantan thermocouple, 0 ° of thermostat, hyperchannel microvolt DBMS Acquisition Processor and computing machine, described freezing room, described copper-constantan thermocouple, described 0 ° of thermostat, described hyperchannel microvolt DBMS Acquisition Processor and described computing machine connect successively, described copper-constantan thermocouple is provided with gauge head, it is characterized in that, the device of described mensuration pomegranate freezing point also comprises a Baltimore groove, described Baltimore groove is placed in described freezing room, described gauge head is through the bottom of Baltimore groove, described gauge head rear end is surrounded by tubular post, described tubular post is movably arranged on the bottom of described Baltimore groove by web member, described tubular post makes gauge head insert pomegranate fruit smoothly.
2. device according to claim 1, is characterized in that, the quantity of described gauge head is three or more.
3. device according to claim 2, it is characterized in that, described three or more gauge head length are different, described three or more gauge heads comprise the gauge head measuring pomegranate fruit pericarp temperature, the gauge head measuring pomegranate fruit top layer fruit grain temperature and measure the gauge head of temperature of pomegranate fruit internal layer fruit grain, the length range measuring the gauge head of pomegranate fruit pericarp temperature is 1 ~ 1.5mm, the length range measuring the gauge head of pomegranate fruit top layer fruit grain temperature is 3 ~ 5mm, and the length range measuring the gauge head of the temperature of pomegranate fruit internal layer fruit grain is 2 ~ 4cm.
4. device according to claim 1, it is characterized in that, the diameter range of described gauge head is 0.5 ~ 0.6mm, and the diameter range of described tubular post is 0.8 ~ 1mm.
5. device according to claim 1, it is characterized in that, described freezing room is computer-controlled temperature adjustable low-temperature storage box, and the adjustable temperature scope of described freezing room is-40 ~-10 DEG C.
6. a method of work for the arbitrary described device of claim 1-5, it is characterized in that, concrete steps comprise:
(1) air dielectric temperature is regulated
Regulate freezing room, make the air dielectric temperature in freezing room be in-15 ~-12 DEG C of temperature ranges or-30 ~-28 DEG C of temperature ranges;
(2) gauge head is inserted
Pomegranate fruit is put into Baltimore groove, fixing pomegranate fruit, and gauge head is inserted pomegranate fruit;
(3) the temperature t of the pomegranate fruit measured
Copper-constantan thermocouple is utilized to measure the temperature t of pomegranate fruit;
(4) freezing test termination time point is determined
Air dielectric temperature in setting procedure (1) freezing room is T, as t≤(T+1) DEG C, is and measures termination time point;
(5) freezing curve is drawn
It is zero point that gauge head inserts the pomegranate fruit time, and the mensuration termination time point described in step (4) is terminal, and in this time interval, take time as horizontal ordinate, the temperature t of pomegranate fruit is ordinate, draws freezing curve;
(6) pomegranate fruit freezing point is determined
According to the freezing curve determination pomegranate fruit freezing point that described step (5) is drawn, when the temperature t of pomegranate fruit does not decline in time, the temperature t of this pomegranate fruit and the freezing point of pomegranate fruit.
7. method of work according to claim 6, it is characterized in that, the insertion gauge head described in step (2), concrete steps comprise:
A, pomegranate fruit is carried out peeling, obtain the pomegranate fruit of part with pericarp, the exposed seed state of remainder;
B, to the arillate part of band, gauge head is thrust 1.0 ~ 1.5mm place of pomegranate fruit pericarp, other gauge head is thrust pomegranate fruit internal layer really in grain through pericarp, and the degree of depth is 1/3 ~ 2/3 of pomegranate radius; To the part of exposed seed, thrust in pomegranate fruit internal layer fruit grain through pomegranate fruit top layer fruit grain by gauge head, the degree of depth is 1/3 ~ 2/3 of pomegranate radius, is thrust by other gauge head in the fruit grain of pomegranate fruit top layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693616.1A CN104374796B (en) | 2014-11-26 | 2014-11-26 | A kind of device measuring Punica granatum L. freezing point and method of work thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410693616.1A CN104374796B (en) | 2014-11-26 | 2014-11-26 | A kind of device measuring Punica granatum L. freezing point and method of work thereof |
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| Publication Number | Publication Date |
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| CN104374796A true CN104374796A (en) | 2015-02-25 |
| CN104374796B CN104374796B (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410693616.1A Expired - Fee Related CN104374796B (en) | 2014-11-26 | 2014-11-26 | A kind of device measuring Punica granatum L. freezing point and method of work thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807849A (en) * | 2015-04-30 | 2015-07-29 | 国家农产品保鲜工程技术研究中心（天津） | Multi-channel freezing point quick determination device of fruits, vegetables and fruit and vegetable juice and application |
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2014
- 2014-11-26 CN CN201410693616.1A patent/CN104374796B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807849A (en) * | 2015-04-30 | 2015-07-29 | 国家农产品保鲜工程技术研究中心（天津） | Multi-channel freezing point quick determination device of fruits, vegetables and fruit and vegetable juice and application |
| CN104807849B (en) * | 2015-04-30 | 2017-08-25 | 国家农产品保鲜工程技术研究中心（天津） | Fruits and vegetables and its juice multichannel freezing point rapid determination device and application |
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| CN104374796B (en) | 2016-09-28 |
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